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. 2024 Mar 22;16(3):e56718. doi: 10.7759/cureus.56718

Appearance and Prevalence of JN.1 SARS-CoV-2 Variant in India and Its Clinical Profile in the State of Maharashtra

Rajesh P Karyakarte 1,2,, Rashmita Das 1,2, Mansi V Rajmane 1, Sonali Dudhate 1, Jeanne Agarasen 1, Praveena Pillai 1, Priyanka M Chandankhede 1, Rutika S Labhshetwar 1, Yogita Gadiyal 1, Preeti P Kulkarni 1, Safanah Nizarudeen 1, Sushma Yanamandra 1, Nyabom Taji 1, Suvarna Joshi 1, Varsha Potdar 3,4
Editors: Alexander Muacevic, John R Adler
PMCID: PMC11032724  PMID: 38646375

Abstract

Background: In August 2023, the BA.2.86 SARS-CoV-2 variant, with over 30 spike protein mutations, emerged amidst the global dominance of XBB sub-lineages. It evolved into JN.1 by late 2023, spreading across 71 countries. JN.1, distinct for its L455S mutation, significantly dominated global sequences, raising concerns over its transmission and clinical impact. The study investigates JN.1's clinical severity and its effect on hospital admissions in Maharashtra, India.

Methodology: The present study involved 3,150 curated Indian SARS-CoV-2 whole genome sequences with collection dates between 1st August 2023 and 15th January 2024. Lineage and phylogenetic analysis of sequences was performed using Nextclade. Telephonic interviews were conducted to confirm the demographic details and obtain clinical information on the JN.1* (* indicates JN.1 and all its sub-lineages) cases. The obtained data were recorded and analyzed using Microsoft® Excel (Microsoft Corporation, Redmond, WA).

Results: Out of 3,150 sequences analyzed, JN.1* was the most common lineage (2377/3150, 75.46%), followed by XBB.2.3* (281/3150, 8.92%) and XBB.1.16* (187/3150, 5.94%). In India, it was first identified on 6th October 2023, in Kerala. The highest proportion of JN.1* sequences originated from Maharashtra (628/2377, 26.42%), followed by West Bengal (320/2377, 13.46%), Andhra Pradesh (293/2377, 12.33%), Kerala (288/2377, 12.12%), and Karnataka (285/2377, 11.99%). In Maharashtra, the JN.1* variant was first identified on 23rd November 2023. A total of 279 JN.1* cases were included in the clinical study. Of these, 95.34% (266/279) had symptomatic disease with mild symptoms; cold (187/279, 67.03%) being the most common symptom, followed by fever (156/279, 55.91%), cough (114/279, 40.86%), and headache (28/279, 15.64%). Of all the cases, 13.26% (37/279) required institutional quarantine or hospitalization, and the rest were isolated at home. Among the hospitalized patients, 54.05% (20/37) cases were given conservative treatment while 45.95% (17/37) cases required supplemental oxygen therapy. Regarding the vaccination status, 94.26% (263/279) of cases received at least one dose of the COVID-19 vaccine, while 5.02% (14/279) were not vaccinated, of which most were children aged zero to nine years (5/14, 35.71%). The overall recovery rate among JN.1* cases was 98.57% (275/279), with 1.43% (4/279) cases succumbing to the disease.

Conclusion: The JN.1* variant, the dominant variant in India, exhibits clinical features similar to previous circulating variants in Maharashtra without increased severity. Its notable transmissibility underscores the importance of studying the ongoing viral evolution. The pressing necessity for swift identification and the clinical features of new variants is essential for effective public health response.

Keywords: covid-19, severe acute respiratory syndrome coronavirus 2, sars-cov-2, clinical characteristics, covid-19 disease, pirola, ba.2.86, ba.2.86.1.1, jn.1

Introduction

At the time when the sub-lineages of the recombinant SARS-CoV-2 variant, XBB, were predominant globally, a new sub-lineage of BA.2 appeared around August 2023 [1]. This new lineage of SARS-CoV-2 was labeled as BA.2.86 on 17th August 2023 [2]. BA.2.86 had more than 30 spike (S) protein mutations over and above its parent lineage, BA.2 [1]. It was first sequenced in Israel and reported on 13th August 2023 [3]. Alarmed by its potential to evade pre-existing immunity against SARS-CoV-2 developed by the administration of vaccines and from previous infections, the World Health Organization (WHO), within four days, promptly designated it as a variant under monitoring (VUM) on 17th August 2023, the day it was labeled as BA.2.86. Later, due to its growing prevalence, as evidenced by genomic surveillance, the WHO escalated its status to the variant of interest (VoI) on 21st November 2023 [4].

In late 2023, the BA.2.86 SARS-CoV-2 variant evolved, leading to the emergence of the JN.1 (BA.2.86.1.1) variant. It was first identified in the United States in September 2023 [5]. At the same time, it was identified in 12 more countries, with the highest proportions in Canada, France, Singapore, Sweden, the United Kingdom, and the United States [6]. Initially monitored within the BA.2.86 variant, the rapid and extensive spread of JN.1 across various nations prompted WHO to designate it as a VOI on 20th December 2023, thereby acknowledging its distinction from its parent lineage, BA.2.86. According to the WHO reports as of 19th January 2024, JN.1 has emerged as the most reported VOI globally, with detection in 71 countries and accounting for 65.5% of all sequences in the final week of 2023 [7]. By January 2024, the JN.1* variant dominated India, representing 97.25% of Indian sequences on the Global Initiative on Sharing All Influenza Data (GISAID), thus highlighting the significant impact and global concern over its transmission dynamics [8].

While JN.1 is closely related to its precursor, BA.2.86, it features a unique mutation, L455S, in the receptor-binding domain (RBD) of its spike protein, alongside three additional mutations in non-spike proteins. A similar L455F mutation in variants HK.3 and other FLip variants has been shown to enhance transmissibility and immune evasion compared to the original EG.5.1 variant [9]. However, information is scarce regarding the potential impact of JN.1 on clinical outcomes. Therefore, the current study aims to evaluate the clinical severity associated with JN.1 infections and its implications for hospital admissions in Maharashtra.

Materials and methods

The present study is a part of the sequencing activity in Maharashtra under the Indian SARS-CoV-2 Genomics Consortium (INSACOG) to study the evolutionary patterns and epidemiological characteristics of SARS-CoV-2.

SARS-CoV-2 whole genome sequences in India: lineage and phylogenetic analysis

To trace the first appearance and the spread of the JN.1 SARS-CoV-2 variant in India, whole genome sequences of the virus, with sample collection dates from 1st August 2023 to 15th January 2024, submitted by various sequencing laboratories in different states and Union Territories of the country, were downloaded from the Indian Biological Data Centre (IBDC) database [10] with their kind permission. Entries with complete metadata, including geographic locations and sample collection dates, were included in the study and the sequences used are accessible in the supplemental table in the Appendices. The lineage and clade analysis were performed using Nextclade software (version 3.0.1). The phylogenetic tree was constructed using Nextclade Augur and visualized using Auspice (version 2.52.1).

Demographic and clinical data collection of SARS-CoV-2-positive cases in Maharashtra

Demographic details, including age, sex, area of residence, contact number, and date of sample collection and testing, were collected from the metadata provided to the sequencing laboratories by the reverse transcription-polymerase chain reaction (RT-PCR) testing centers. Telephonic interviews were conducted with each patient to confirm their demographic details and obtain clinical information such as symptoms, isolation type, hospitalization, oxygen requirements, treatments, and vaccination status. Those patients who chose not to disclose their clinical history during the interview were documented and excluded from the study.

Also, daily records from 1st August 2023 to 15th January 2024 were collected from the State's District Health Services Department to assess the severity of illness linked to the JN.1 SARS-CoV-2 variant during its surge in Maharashtra and its impact on public health. The data collected included the daily total number of samples tested for SARS-CoV-2, test positivity, hospital admissions, and the demand for oxygen throughout the state.

Statistical analysis

All demographic and clinical data were recorded and analyzed using Microsoft® Excel (Microsoft Corporation, Redmond, WA), and analysis was performed using Microsoft® Excel. Continuous variables were presented as median and interquartile range (IQR). Categorical variables were presented as numbers and percentages.

Results

Distribution of SARS-CoV-2 lineages in India

A total of 3,150 downloaded sequences were included in the study following data curation. A total of 144 different lineages were identified following Nextclade Pangolin nomenclature. JN.1* was the most common lineage (75.46%), followed by XBB.2.3* (8.92%) and XBB.1.16* (5.94%) (Table 1).

Table 1. Distribution of SARS-CoV-2 variants among sequences deposited on IBDC from India.

IBDC: Indian Biological Data Centre.

Clade Nextclade Pangolin lineage Count (%)
21K BA.1* BA.1 2 23 (0.73%)
BA.1.1 21
21L BA.2* BA.2 31 56 (1.78%)
BA.2.1 4
BA.2.10.4 1
BA.2.12 1
BA.2.38 13
BA.2.38.1 1
BA.2.76 1
22C BA.2.12.1 1
CH.1.1.24 1
DV.7.1.3 1
FK.1.1 1
22B BA.5* BA.5 1 5 (0.16%)
BA.5.5 1
BA.5.5.1 1
BE.1.1 1
22E BQ.1.22 1
23A XBB.1.5* GF.1 1 11 (0.35%)
JD.1.1 2
XBB.1.5 6
XBB.1.5.28 1
23G GK.1.1 1
23D XBB.1.9* XBB.1.9.1 2 47 (1.49%)
EG.5.2 1
FL.1.5 1
FL.1.5.1 2
FL.13.2 1
FL.13.4.1 1
FL.4.8 1
HN.5 1
23F EG.5.1 3
EG.5.1.1 5
EG.5.1.15 1
EG.5.1.3 1
EG.5.1.6 2
EG.5.1.8 1
HK.19 1
HK.29 1
HV.1 10
HV.1.11 2
JG.3 3
JG.3.2 1
23H HK.3 4
HK.3.1 1
HK.3.5 1
23B XBB.1.16* XBB.1.16 57 187 (5.94%)
XBB.1.16.1 17
XBB.1.16.11 37
XBB.1.16.12 3
XBB.1.16.13 1
XBB.1.16.17 32
XBB.1.16.18 3
XBB.1.16.2 1
XBB.1.16.24 28
XBB.1.16.8 1
FU.1 3
FU.3.1 1
JF.1.1 1
JM.2 2
23E XBB.2.3* GE.1 85 281 (8.92%)
GE.1.1 10
GJ.1 4
GJ.1.1 8
GJ.1.2 2
GJ.3 1
GJ.6 4
GS.1 1
GZ.1 5
HH.1 1
HH.2 5
HH.6 10
HH.8 1
JE.1 1
JY.1 44
JY.1.1 47
XBB.2.3 15
XBB.2.3.10 1
XBB.2.3.11 2
XBB.2.3.12 1
XBB.2.3.18 1
XBB.2.3.19 2
XBB.2.3.2 7
XBB.2.3.22 1
XBB.2.3.3 20
XBB.2.3.5 1
XBB.2.3.8 1
23I BA.2.86* BA.2.86 15 32 (1.02%)
BA.2.86.1 12
JN.2 3
JN.4 1
JN.6 1
JN.1* JN.1 1026 2377 (75.46%)
JN.1.1 959
JN.1.1.1 1
JN.1.1.3 1
JN.1.10 7
JN.1.11 304
JN.1.2 2
JN.1.3 2
JN.1.4 36
JN.1.5 21
JN.1.6 1
JN.1.7 1
JN.1.8 10
JN.1.9 6
22F Other XBBs XBB 1 13 (0.41%)
XBB.1 1
GW.5.1.1 3
GW.5.3.1 2
JC.2 2
KE.2 1
XBB.1.41.1 1
XBB.2.4 1
XBB.2.6 1
Recombinant Other recombinant variants XAC 1 35 (1.11%)
XAD 2
XAF 1
XAG 2
XAH 2
XAK 1
XBH 1
XBQ 1
XBW 1
XCG 1
XCH.1 1
XDA 12
XDA.1 1
XDB 3
XDD 4
XDK 1
19A Other lineages B 4 44 (1.40%)
20A B.1 7
20B B.1.1 11
B.1.1.161 4
B.1.1.220 1
B.1.1.519 2
20C B.1.566 1
20F D.2 1
20G B.1.2 2
21C B.1.429 3
21J AY.4 2
21M B.1.1.529 5
22A BA.4.6 1
Lineage unassigned (due to poor quality sequences) 39 (1.24%)
Grand total 3150

Figure 1 illustrates the evolutionary relationship of the JN.1* variant (clade 23I) in comparison to other variants. In India, the temporal distribution of variants indicates that the XBB variant and its related lineages were predominant from week 31, 2023, until week 45, 2023 (Figure 2). The JN.1* variant was first identified in Indian sequences on 6th October 2023 in Kerala. Subsequently, by December 2023, the JN.1* variant became the most prevalent variant across India. The JN.1* variant has grown from 8.33% since its first detection in week 40, 2023, to 93.83% in week two, 2024. Of all the sequences submitted by various states, 75% are of the JN.1* variant, with the highest proportion of JN.1* sequences originating from Maharashtra (26.42%), followed by West Bengal (13.46%), Andhra Pradesh (12.33%), Kerala (12.12%), and Karnataka (11.99%) (Figure 3).

Figure 1. Evolutionary relationship of clade 23I with other clades in India.

Figure 1

The figure represents the phylogenetic relationship of clade 23I with other clades identified in Indian sequences during the study period. The horizontal axis of the phylogenetic tree denotes the number of mutations, with the numbers increasing progressively from left to right. The branches, represented by horizontal lines, signify evolutionary divergence over time. The length of the branch horizontally correlates with the amount of change. The vertical axis on the other hand organizes the clade labels in a spatial manner for clarity. It does not imply any phylogenetic or temporal relationship.

Image credits: Rashmita Das

Figure 2. Temporal distribution of SARS-CoV-2 variants based on sequences submitted to the IBDC in India.

Figure 2

IBDC: Indian Biological Data Centre.

Image credits: Rashmita Das

Figure 3. Geographic distribution of the 2377 JN.1* SARS-CoV-2 sequences based on sequences submitted to the IBDC in India.

Figure 3

IBDC: Indian Biological Data Centre.

Image credits: Rashmita Das

Test positivity and lineage distribution of SARS-CoV-2 in Maharashtra

Figure 4 represents the overview of SARS-CoV-2 testing in Maharashtra, tracking the total number of tests performed (including RT-PCR and antigen testing) and the positivity rate from the 31st week of 2023 through the second week of 2024. The total tests performed show significant variability with notable spikes toward the end of the period (in weeks 52 of 2023 and the first and second weeks of 2024), suggesting increased testing efforts during these weeks. Similarly, the weekly positivity rate also experienced fluctuations throughout the period. The highest positivity rate was 2.67% in the 38th week of 2023. Following this peak, the positivity rate gradually declined, reaching its lowest in the 45th week (0.21%) and increasing again to 1.81% in the 51st week. Following the first detection of the JN.1* variant globally, the testing efforts in the state and the country were increased [11], thus explaining the variations in both the number of tests performed and the positivity rate reflecting the changes in the testing strategies and the public health policies in the state.

Figure 4. Weekly tests performed versus weekly count of positive cases in Maharashtra between 1st August 2023 and 15th January 2024.

Figure 4

Image credits: Rashmita Das

Figure 5 presents the weekly distribution of SARS-CoV-2 variants in Maharashtra from week 31, 2023 to week two, 2024, mirroring the trend observed across India. The JN.1* variant was first identified on 23rd November 2023, and its prevalence rose from 20% in week 47, 2023, to 100% by the second week of 2024.

Figure 5. Temporal distribution of SARS-CoV-2 variants based on sequences submitted to the IBDC from Maharashtra.

Figure 5

IBDC: Indian Biological Data Centre.

Image credits: Rashmita Das

Demographic and clinical characteristics of JN.1* SARS-CoV-2 variant in Maharashtra

Out of 628 JN.1* cases in Maharashtra, 550 (87.58%) cases had complete metadata available and were included in the demographic study (Table 2). Of these 550 participants, 55.45% were males and 44.55% were females. The median age of the study population was 42 (IQR: 30-60) years, with individuals aged 60 years and above (25.09%) being predominantly affected.

Table 2. Demographic characteristics of JN.1* SARS-CoV-2 variant in Maharashtra (n = 550).

Demographic characteristics Count (%)
Gender-wise distribution
Male 305 (55.45%)
Female 245 (44.55%)
Age-wise distribution (in years)
0-9 05 (0.91%)
10-19 39 (7.09%)
20-29 84 (15.27%)
30-39 115 (20.91%)
40-49 84 (15.27%)
50-59 85 (15.45%)
60 and above 138 (25.09%)
Area-wise distribution
Ahmednagar 02 (0.36%)
Akola 02 (0.36%)
Amravati 18 (3.27%)
Chhatrapati Sambhajinagar 54 (9.82%)
Beed 03 (0.55%)
Bhandara 01 (0.18%)
Hingoli 03 (0.55%)
Jalgaon 04 (0.73%)
Jalna 02 (0.36%)
Kolhapur 10 (1.82%)
Mumbai 18 (3.27%)
Nagpur 36 (6.55%)
Nanded 02 (0.36%)
Nandurbar 01 (0.18%)
Nashik 02 (0.36%)
Osmanabad 02 (0.36%)
Pune 273 (49.64%)
Raigad 18 (3.27%)
Sangli 01 (0.18%)
Satara 01 (0.18%)
Solapur 13 (2.36%)
Thane 83 (15.09%)
Yavatmal 01 (0.18%)

From this subset of 550 cases, attempts to contact 253 (46%) participants were unsuccessful due to non-response to calls, and 18 (3.27%) participants declined participation in the study. Therefore, 279 (50.73%) participants were successfully contacted and included in the clinical study. Table 3 summarizes the clinical characteristics, vaccination status, and outcome of JN.1* cases in Maharashtra. Most JN.1* cases had symptomatic disease (95.34%) with mild symptoms. The most common symptoms were cold (67.03%), fever (55.91%), cough (40.86%), headache (15.64%), body ache (9.68%), and fatigue (8.60%). Underlying comorbid conditions, either alone or in combination, were reported in 17.56% (49 out of 279) of cases, with diabetes mellitus (29, alone or in combination; 59.18%), hypertension (22, alone or in combination; 44.90%), and underlying lung pathology (six, alone or in combination; 12.25%) being the most common conditions.

Table 3. Clinical characteristics of JN.1* SARS-CoV-2 variant in Maharashtra (n = 279).

Out of 550 JN.1* cases with complete metadata, 279 participants were successfully contacted and included in the clinical study.

Clinical characteristics Count (%)
1. History of previous infection
Present 41 (14.69%)
Absent 238 (85.31%)
2. Presence of comorbidities
a. Present 49 (17.56%)
i. Diabetes mellitus (DM) 18 (36.73%)
ii. Hypertension (HTN) 12 (24.29%)
iii. Underlying lung disease 04 (8.16%)
iv. Arthritis 01 (2.04%)
v. Tuberculosis 01 (2.04%)
vi. Hypothyroidism 01 (2.04%)
vii. Coronary heart disease (CHD) 01 (2.04%)
viii. HIV/AIDS 01 (2.04%)
ix. DM + HTN 08 (16.33%)
x. DM + underlying lung disease 01 (2.04%)
xi. DM + HTN + CHD 01 (2.04%)
xii. DM + HTN + underlying lung disease 01 (2.04%)
b. Absent 230 (82.44%)
3. Vaccination status
a. Vaccinated 263 (94.26%)
i. One dose 12 (4.56%)
ii. Two doses 151 (57.42%)
iii. Booster dose (precautionary dose) 100 (38.02%)
b. Not vaccinated 14 (5.02%)
c. Data not available 02 (0.72%)
4. Symptom status
a. Symptomatic 266 (95.34%)
b. Asymptomatic 13 (4.66%)
5. Presenting symptoms
a. Fever 156 (55.91%)
b. Cold 187 (67.03%)
c. Cough 114 (40.86%)
d. Breathlessness 15 (5.38%)
e. Headache 28 (15.64%)
f. Fatigue 24 (8.60%)
g. Body ache 27 (9.68%)
h. Diarrhea 02 (0.72%)
i. Sore throat 16 (5.74%)
j. Vomiting 02 (0.72%)
k. Chest pain 01 (0.36%)
l. Loss of taste and smell 01 (0.36%)
m. Joint pain 01 (0.36%)
6. Type of quarantine
a. Home isolation 242 (86.74%)
b. Hospital isolation/hospitalization 37 (13.26%)
7. Treatment
a. Received no treatment 03 (1.075%)
b. Received symptomatic treatment 259 (92.83%)
c. Received oxygen therapy 14 (5.02%)
i. Non-invasive ventilation 09 (64.29%)
ii. Invasive ventilation 05 (35.71%)
d. Received antiviral/steroid with oxygen 03 (1.075%)
8. Outcome
a. Alive 275 (98.57%)
b. Dead 04 (1.43%)

Regarding the vaccination status, 94.26% (263 out of 279) of cases received at least one dose of the COVID-19 vaccine, while 5.02% (14 out of 279) were not vaccinated. Most unvaccinated individuals were children aged zero to nine years (five out of 14, 35.71%) and adults aged 30-39 years (three out of 14, 21.43%). Covishield (ChAdOx1nCoV-19 coronavirus vaccine) (242 out of 263, 92.01%) was the predominant vaccine administered, followed by CovaxinTM (BBV152A-a whole inactivated virus-based COVID-19 vaccine) (18 out of 263, 6.84%).

Of all the cases, 13.26% (37 out of 279) required institutional quarantine or hospitalization. Nearly all of the patients who were home-isolated received conservative treatment (240 out of 242, 99.17%), whereas hospitalized patients often received conservative care (20 out of 37, 54.05%) or required supplemental oxygen therapy (17 out of 37, 45.95%). The recovery rate was high; out of 279 cases, 98.57% of cases (275 out of 279) recovered from the disease, while 1.43% (four out of 279) succumbed.

Among the deceased, three were over 60 years of age (75%), and one (25%) was in the age group of 30-39 years. Three out of four cases (75%) suffered from respiratory symptoms and had underlying comorbidities, while one (25%) did not have respiratory symptoms and was admitted to the hospital due to paralysis. Of the three cases with respiratory symptoms, two were aged over 60 years with pre-existing conditions such as chronic obstructive pulmonary disease in one, and diabetes mellitus and hypertension in the other. The third was an immunocompromised individual with HIV/AIDS. Regarding vaccination, two were vaccinated with two doses, one received three doses of vaccine, and the vaccination status was unclear in one.

Weekly trends in isolation bed occupancy in hospitals, oxygen/ventilator support, and COVID-19-positive cases in Maharashtra

Out of the total positive cases in the state, 8.03% (338 out of 4211) required hospital admission. Among these hospitalized cases, 61.24% (207 out of 338) were managed in isolation beds without the need for oxygen support, while the remaining 38.76% (131 out of 338) needed oxygen or ventilator support. Mirroring the state's positivity rate trend, the patterns of hospital admissions and the need for oxygen support also showed fluctuations during the same timeframe (Figure 6).

Figure 6. Weekly trends in isolation bed occupancy in hospitals, oxygen/ventilator support, and COVID-19-positive cases in Maharashtra.

Figure 6

Image credits: Rashmita Das

Discussion

Although the BA.2.86 variant was first reported in August 2023 globally, it did not exhibit significant growth advantages or abilities to evade the humoral immune response compared to the global dominant variants such as EG.5.1 and HK.3 [12]. Over four weeks, from week 40 to week 44 of 2023, the percentage of BA.2.86 sequences slowly and steadily increased from 1.8% to 8.9% [4]. Conversely, the JN.1 variant, distinguished by a single additional mutation (L455S) in its spike protein compared to BA.2.86, swiftly ascended to global dominance. Within the same duration of four weeks, from week 44 to week 48 of 2023, its global prevalence surged from 3.3% to 27.1% [13], making up 95% of all sequences collected globally in February 2024 [14]. The quick shift from XBB sub-lineages to JN.1* mirrors the transition of Delta to the Omicron variant. In the Omicron wave, Omicron's prevalence increased from under 0.1% to 89.1%, making it the globally dominant variant within nine weeks [15,16]. The rapid emergence and dominance of the JN.1 variant in India and globally can be attributed to its enhanced transmissibility due to spike mutation L455S. In the early stages of its emergence, analysis of JN.1's effective reproductive number (Ro) using sequences from France, the United Kingdom, and Spain indicated that the JN.1 Ro exceeded that of both BA.2.86.1 and HK.3, with the latter being among the XBB lineages with the most significant growth advantage as of late November 2023. This analysis predicted JN.1's trajectory toward global dominance, a status that it had achieved in France and Spain by the close of November 2023 [9]. Presently, the JN.1* variant exhibits a relative growth advantage of 57% (confidence interval: 56-57%) [17].

The in vitro angiotensin-converting enzyme 2 (ACE2)-binding assay [9] and surface plasmon resonance analysis [12] using the RBD (monomeric) of JN.1 and BA.2.86 showed a significant reduction in the affinity of the JN.1 RBD when compared to the BA.2.86 RBD for human ACE2 receptor. Conversely, the pseudovirus assay using trimerized whole spike protein showed that the infectivity rate of JN.1 was substantially greater than that of BA.2.86 [9]. The neutralization assays demonstrated a superior ability of the JN.1 variant to evade the immune response compared to BA.2.86, with a 2.1-fold decrease in neutralization titers against antibodies from individuals reinfected with XBB after BA.5/BF.7 infection, and a 1.1-fold reduction from those with XBB breakthrough infections [9,12]. It was also shown that a small change in the L455, which is predominantly located at the epitope of RBD class 1 antibodies, enhanced JN.1's ability to evade class 1 monoclonal antibodies, making up for the fact that the parent variant, BA.2.86, was susceptible to this antibody group. However, one of the therapeutic antibodies, SA55, was shown to retain its efficacy against JN.1 [12]. As indicated by the pseudovirus assay and neutralization assays mentioned earlier, JN.1 has increased infectivity and immune evasion capabilities compared to BA.2.86.

The JN.1 variant caused mild infections in Maharashtra, mirroring the clinical outcomes observed during the previous waves in the state caused by BA.2.75, XBB, and XBB.1.16, with similar rates of hospital admissions, oxygen requirements, and mortality. In contrast to earlier waves where individuals aged 21-40 years were primarily affected, the current wave has seen a significant shift, with those aged 60 years and above being predominantly affected [18-20]. Despite a notable increase in number of positive cases, health services data showed that the overall hospitalization rate during the study period was 8.03%, and oxygen support was needed in 3.11% of positive cases, reiterating our observations that the uptick in case positivity did not significantly impact the hospitalization or oxygen demand in the state.

This evolutionary pattern of JN.1 arising from BA.2.86 is similar to the previous transition of CH.1.1 (BA.2.75.3.4.1.1.1.1) arising from BA.2.75 [12]. Albeit the addition of a new mutation in JN.1 helped it to overcome the competition faced by the parent BA.2.86 from the existing dominant XBB variants. On the other hand, mutations of CH.1.1 helped to evade the neutralizing antibodies developed in the hosts against the parent lineage, i.e., BA.2.75, which had caused widespread infection in the community. The emergence of XBB due to recombination of BJ.1 (BA.2.10.1) and BM.1.1.1 (BA.2.75.3.1.1.1) also demonstrates the innovative evolutionary strategy of SARS-CoV-2 to evade the existing neutralizing antibodies against the parent lineages. This highlights the importance of closely monitoring variants with high ACE2-binding affinity and distinct antigenic characteristics. Hence, the early detection of these mutations is crucial before they lead to evident health implications, a task that case-based surveillance might not adequately accomplish. Instead, implementing broad, population-level surveillance methods, like wastewater-based surveillance, is essential for uncovering cryptic mutations and variants. For instance, a study in Berlin, Germany, demonstrated the effectiveness of this approach by identifying the JN.1 variant in wastewater three weeks before it was detected in clinical samples, highlighting the value of population-based surveillance in early detection efforts [21]. Therefore, prompt identification of novel SARS-CoV-2 variants is vital for facilitating rapid risk evaluations, timely dissemination of information, and coordinated public health responses.

The study suffers from a few limitations. First, the analysis depends on individuals who tested for COVID-19, allowing their samples to be sequenced, and individuals who responded and consented to the study, suggesting that the reported figures might not represent the actual burden of the disease. Secondly, the study is region-specific, with data from Maharashtra. Therefore, the findings of this study might restrict its generalizability to other geographic areas and populations with different demographic characteristics. Additionally, the clinical data were obtained through telephonic conversation, potentially leading to recall bias among patients. Therefore, more comprehensive studies are needed to enhance representativeness and accuracy, including studies in diverse geographic locations and populations and using a wider range of data collection methods.

Conclusions

The JN.1* variant has emerged as the predominant SARS-CoV-2 variant in India, with clinical presentation similar to previous variants circulating in Maharashtra, India. Notably, while JN.1* has not been associated with more severe disease outcomes, its enhanced transmissibility underscores the importance of studying the ongoing viral evolution. The evolution of the virus by adding novel mutations necessitates prompt detection strategies to prevent potential surges. The pressing necessity for swift identification and the clinical features of new variants will enable public health authorities to predict and mitigate the risks effectively, ensuring preparedness against future outbreaks.

Acknowledgments

We acknowledge the Indian Biological Data Centre (IBDC), Regional Centre for Biotechnology, Department of Biotechnology, Ministry of Science and Technology, Government of India, for providing access to SARS-CoV-2 sequences deposited by INSACOG laboratories. We thank the Maharashtra State Integrated Disease Surveillance Program (IDSP) and District Health Services, Pune, for their valuable contribution to daily COVID-19 statistics for the state. We also acknowledge Poonam Pacharne, Vishal Rajput, and Riyakshi Rajkhowa from Byramjee Jeejeebhoy Government Medical College and Sassoon General Hospitals, Pune, as well as Pratiksha Tulshidas Pawar and Snehal Vasant Jagadale from Indian Council of Medical Research-National Institute of Virology, Pune for their valuable technical assistance throughout the study.

Appendices

Table 4. IDs of the sequences used in the study, downloaded from the Indian Biological Data Centre (IBDC), Regional Centre for Biotechnology, Department of Biotechnology, Ministry of Science and Technology, Government of India, with their kind permission.

IDs of the sequences used in the study, downloaded from the Indian Biological Data Centre (IBDC), Regional Centre for Biotechnology, Department of Biotechnology, Ministry of Science and Technology, Government of India, with their kind permission
INCOV286977
INCOV286992
INCOV287059
INCOV287062
INCOV287064
INCOV287066
INCOV287067
INCOV287068
INCOV287069
INCOV287083
INCOV287086
INCOV287087
INCOV287106
INCOV287107
INCOV287108
INCOV287109
INCOV287110
INCOV287111
INCOV287112
INCOV287113
INCOV287117
INCOV287118
INCOV287119
INCOV287121
INCOV287123
INCOV287124
INCOV287125
INCOV287126
INCOV287127
INCOV287129
INCOV287137
INCOV287138
INCOV287140
INCOV287141
INCOV287146
INCOV287147
INCOV287167
INCOV287168
INCOV287169
INCOV287170
INCOV287171
INCOV287172
INCOV287173
INCOV287174
INCOV287175
INCOV287176
INCOV287177
INCOV287178
INCOV287179
INCOV287180
INCOV287181
INCOV287182
INCOV287183
INCOV287184
INCOV287186
INCOV287187
INCOV287188
INCOV287189
INCOV287190
INCOV287191
INCOV287192
INCOV287193
INCOV287194
INCOV287195
INCOV287196
INCOV287197
INCOV287198
INCOV287199
INCOV287200
INCOV287201
INCOV287202
INCOV287203
INCOV287204
INCOV287205
INCOV287206
INCOV287207
INCOV287208
INCOV287209
INCOV287210
INCOV287211
INCOV287212
INCOV287213
INCOV287214
INCOV287215
INCOV287216
INCOV287217
INCOV287218
INCOV287219
INCOV287220
INCOV287221
INCOV287222
INCOV287223
INCOV287224
INCOV287225
INCOV287226
INCOV287227
INCOV287228
INCOV287229
INCOV287230
INCOV287231
INCOV287232
INCOV287233
INCOV287234
INCOV287235
INCOV287236
INCOV287237
INCOV287238
INCOV287239
INCOV287240
INCOV287241
INCOV287242
INCOV287243
INCOV287244
INCOV287245
INCOV287246
INCOV287247
INCOV287248
INCOV287249
INCOV287250
INCOV287251
INCOV287252
INCOV287253
INCOV287257
INCOV287258
INCOV287265
INCOV287266
INCOV287267
INCOV287268
INCOV287269
INCOV287270
INCOV287271
INCOV287272
INCOV287273
INCOV287274
INCOV287275
INCOV287277
INCOV287278
INCOV287279
INCOV287280
INCOV287281
INCOV287282
INCOV287283
INCOV287284
INCOV287286
INCOV287287
INCOV287288
INCOV287289
INCOV287293
INCOV287294
INCOV287295
INCOV287296
INCOV287297
INCOV287298
INCOV287299
INCOV287300
INCOV287302
INCOV287308
INCOV287309
INCOV287310
INCOV287311
INCOV287312
INCOV287313
INCOV287372
INCOV287373
INCOV287374
INCOV287375
INCOV287376
INCOV287377
INCOV287378
INCOV287379
INCOV287380
INCOV287381
INCOV287382
INCOV287383
INCOV287384
INCOV287385
INCOV287386
INCOV287387
INCOV287388
INCOV287389
INCOV287390
INCOV287391
INCOV287392
INCOV287393
INCOV287394
INCOV287395
INCOV287396
INCOV287397
INCOV287398
INCOV287399
INCOV287400
INCOV287401
INCOV287402
INCOV287403
INCOV287404
INCOV287554
INCOV287555
INCOV287556
INCOV287558
INCOV287559
INCOV287560
INCOV287561
INCOV287562
INCOV287567
INCOV287568
INCOV287569
INCOV287570
INCOV287571
INCOV287572
INCOV287573
INCOV287574
INCOV287575
INCOV287576
INCOV287577
INCOV287578
INCOV287579
INCOV287580
INCOV287581
INCOV287585
INCOV287587
INCOV287588
INCOV287589
INCOV287590
INCOV287591
INCOV287592
INCOV287593
INCOV287893
INCOV287894
INCOV287895
INCOV287896
INCOV287897
INCOV287898
INCOV287899
INCOV287900
INCOV287901
INCOV287902
INCOV287903
INCOV287904
INCOV287905
INCOV287906
INCOV287907
INCOV287908
INCOV287909
INCOV287910
INCOV287950
INCOV287951
INCOV287952
INCOV287953
INCOV287954
INCOV287955
INCOV287956
INCOV287957
INCOV287958
INCOV287959
INCOV287961
INCOV287962
INCOV287963
INCOV287964
INCOV287965
INCOV287967
INCOV287968
INCOV287969
INCOV287970
INCOV287971
INCOV287972
INCOV287973
INCOV287974
INCOV287975
INCOV287976
INCOV287977
INCOV287978
INCOV287979
INCOV287980
INCOV287981
INCOV287982
INCOV287983
INCOV287984
INCOV287985
INCOV287986
INCOV287987
INCOV287988
INCOV287989
INCOV287990
INCOV287991
INCOV287992
INCOV287993
INCOV287994
INCOV287995
INCOV287996
INCOV287997
INCOV287998
INCOV287999
INCOV288000
INCOV288001
INCOV288002
INCOV288003
INCOV288004
INCOV288005
INCOV288006
INCOV288007
INCOV288008
INCOV288009
INCOV288012
INCOV288013
INCOV288015
INCOV288016
INCOV288017
INCOV288018
INCOV288019
INCOV288020
INCOV288021
INCOV288022
INCOV288023
INCOV288024
INCOV288025
INCOV288026
INCOV288029
INCOV288030
INCOV288031
INCOV288033
INCOV288034
INCOV288035
INCOV288036
INCOV288037
INCOV288038
INCOV288039
INCOV288040
INCOV288041
INCOV288042
INCOV288043
INCOV288045
INCOV288046
INCOV288047
INCOV288048
INCOV288049
INCOV288050
INCOV288051
INCOV288052
INCOV288053
INCOV288054
INCOV288055
INCOV288056
INCOV288057
INCOV288058
INCOV288059
INCOV288060
INCOV288061
INCOV288062
INCOV288063
INCOV288064
INCOV288065
INCOV288066
INCOV288067
INCOV288068
INCOV288069
INCOV288070
INCOV288071
INCOV288072
INCOV288073
INCOV288074
INCOV288075
INCOV288076
INCOV288077
INCOV288078
INCOV288079
INCOV288080
INCOV288081
INCOV288083
INCOV288084
INCOV288085
INCOV288087
INCOV288088
INCOV288089
INCOV288095
INCOV288096
INCOV288098
INCOV288099
INCOV288114
INCOV288116
INCOV288117
INCOV288120
INCOV288121
INCOV288122
INCOV288123
INCOV288124
INCOV288125
INCOV288126
INCOV288127
INCOV288128
INCOV288129
INCOV288130
INCOV288131
INCOV288132
INCOV288133
INCOV288134
INCOV288135
INCOV288136
INCOV288137
INCOV288138
INCOV288139
INCOV288140
INCOV288141
INCOV288142
INCOV288143
INCOV288144
INCOV288145
INCOV288146
INCOV288147
INCOV288148
INCOV288149
INCOV288150
INCOV288151
INCOV288152
INCOV288153
INCOV288154
INCOV288155
INCOV288156
INCOV288170
INCOV288171
INCOV288172
INCOV288173
INCOV288174
INCOV288175
INCOV288176
INCOV288177
INCOV288178
INCOV288179
INCOV288180
INCOV288181
INCOV288182
INCOV288183
INCOV288184
INCOV288185
INCOV288186
INCOV288207
INCOV288208
INCOV288209
INCOV288210
INCOV288211
INCOV288212
INCOV288213
INCOV288214
INCOV288215
INCOV288216
INCOV288217
INCOV288218
INCOV288219
INCOV288220
INCOV288221
INCOV288222
INCOV288223
INCOV288224
INCOV288225
INCOV288226
INCOV288227
INCOV288228
INCOV288229
INCOV288230
INCOV288231
INCOV288232
INCOV288233
INCOV288234
INCOV288235
INCOV288236
INCOV288237
INCOV288238
INCOV288239
INCOV288240
INCOV288241
INCOV288242
INCOV288243
INCOV288244
INCOV288246
INCOV288247
INCOV288248
INCOV288249
INCOV288250
INCOV288251
INCOV288252
INCOV288253
INCOV288254
INCOV288255
INCOV288256
INCOV288257
INCOV288258
INCOV288259
INCOV288260
INCOV288261
INCOV288262
INCOV288263
INCOV288264
INCOV288265
INCOV288266
INCOV288267
INCOV288268
INCOV288269
INCOV288270
INCOV288271
INCOV288272
INCOV288273
INCOV288274
INCOV288275
INCOV288276
INCOV288277
INCOV288278
INCOV288279
INCOV288280
INCOV288281
INCOV288282
INCOV288283
INCOV288284
INCOV288285
INCOV288286
INCOV288287
INCOV288288
INCOV288289
INCOV288290
INCOV288291
INCOV288292
INCOV288293
INCOV288294
INCOV288295
INCOV288296
INCOV288297
INCOV288298
INCOV288299
INCOV288300
INCOV288301
INCOV288302
INCOV288303
INCOV288304
INCOV288305
INCOV288306
INCOV288307
INCOV288308
INCOV288309
INCOV288310
INCOV288311
INCOV288312
INCOV288313
INCOV288314
INCOV288315
INCOV288316
INCOV288317
INCOV288318
INCOV288319
INCOV288320
INCOV288321
INCOV288322
INCOV288323
INCOV288324
INCOV288325
INCOV288326
INCOV288327
INCOV288328
INCOV288329
INCOV288330
INCOV288331
INCOV288332
INCOV288333
INCOV288334
INCOV288335
INCOV288336
INCOV288337
INCOV288338
INCOV288339
INCOV288340
INCOV288341
INCOV288342
INCOV288343
INCOV288344
INCOV288345
INCOV288346
INCOV288347
INCOV288348
INCOV288349
INCOV288350
INCOV288351
INCOV288352
INCOV288353
INCOV288354
INCOV288355
INCOV288356
INCOV288357
INCOV288358
INCOV288359
INCOV288360
INCOV288361
INCOV288362
INCOV288363
INCOV288364
INCOV288365
INCOV288366
INCOV288367
INCOV288368
INCOV288369
INCOV288370
INCOV288371
INCOV288372
INCOV288373
INCOV288374
INCOV288375
INCOV288376
INCOV288377
INCOV288378
INCOV288379
INCOV288380
INCOV288381
INCOV288382
INCOV288383
INCOV288384
INCOV288385
INCOV288386
INCOV288387
INCOV288388
INCOV288389
INCOV288390
INCOV288391
INCOV288392
INCOV288393
INCOV288394
INCOV288395
INCOV288396
INCOV288397
INCOV288398
INCOV288399
INCOV288400
INCOV288401
INCOV288402
INCOV288403
INCOV288404
INCOV288405
INCOV288406
INCOV288407
INCOV288408
INCOV288409
INCOV288410
INCOV288411
INCOV288412
INCOV288413
INCOV288414
INCOV288415
INCOV288416
INCOV288417
INCOV288418
INCOV288419
INCOV288420
INCOV288421
INCOV288422
INCOV288423
INCOV288424
INCOV288425
INCOV288426
INCOV288427
INCOV288428
INCOV288429
INCOV288430
INCOV288431
INCOV288432
INCOV288433
INCOV288434
INCOV288435
INCOV288436
INCOV288437
INCOV288438
INCOV288439
INCOV288440
INCOV288441
INCOV288442
INCOV288443
INCOV288444
INCOV288445
INCOV288446
INCOV288447
INCOV288448
INCOV288449
INCOV288450
INCOV288451
INCOV288452
INCOV288453
INCOV288454
INCOV288455
INCOV288456
INCOV288457
INCOV288458
INCOV288459
INCOV288460
INCOV288461
INCOV288462
INCOV288463
INCOV288464
INCOV288465
INCOV288466
INCOV288467
INCOV288468
INCOV288469
INCOV288470
INCOV288471
INCOV288472
INCOV288473
INCOV288474
INCOV288475
INCOV288476
INCOV288477
INCOV288478
INCOV288479
INCOV288480
INCOV288481
INCOV288482
INCOV288483
INCOV288484
INCOV288485
INCOV288486
INCOV288487
INCOV288488
INCOV288489
INCOV288490
INCOV288491
INCOV288492
INCOV288493
INCOV288494
INCOV288495
INCOV288496
INCOV288497
INCOV288498
INCOV288499
INCOV288500
INCOV288501
INCOV288502
INCOV288503
INCOV288504
INCOV288505
INCOV288506
INCOV288507
INCOV288508
INCOV288509
INCOV288510
INCOV288511
INCOV288512
INCOV288513
INCOV288514
INCOV288515
INCOV288516
INCOV288517
INCOV288518
INCOV288519
INCOV288520
INCOV288521
INCOV288522
INCOV288523
INCOV288524
INCOV288525
INCOV288526
INCOV288527
INCOV288528
INCOV288529
INCOV288530
INCOV288531
INCOV288532
INCOV288533
INCOV288534
INCOV288535
INCOV288536
INCOV288537
INCOV288538
INCOV288539
INCOV288540
INCOV288541
INCOV288542
INCOV288543
INCOV288544
INCOV288545
INCOV288546
INCOV288547
INCOV288548
INCOV288549
INCOV288550
INCOV288551
INCOV288552
INCOV288553
INCOV288554
INCOV288555
INCOV288556
INCOV288557
INCOV288558
INCOV288559
INCOV288560
INCOV288561
INCOV288562
INCOV288563
INCOV288564
INCOV288567
INCOV288568
INCOV288569
INCOV288570
INCOV288571
INCOV288572
INCOV288573
INCOV288574
INCOV288575
INCOV288576
INCOV288577
INCOV288578
INCOV288579
INCOV288580
INCOV288581
INCOV288582
INCOV288583
INCOV288584
INCOV288585
INCOV288586
INCOV288587
INCOV288588
INCOV288589
INCOV288590
INCOV288591
INCOV288592
INCOV288593
INCOV288594
INCOV288595
INCOV288596
INCOV288597
INCOV288598
INCOV288599
INCOV288600
INCOV288601
INCOV288602
INCOV288603
INCOV288604
INCOV288605
INCOV288606
INCOV288607
INCOV288608
INCOV288609
INCOV288610
INCOV288611
INCOV288612
INCOV288613
INCOV288614
INCOV288615
INCOV288616
INCOV288617
INCOV288618
INCOV288619
INCOV288620
INCOV288621
INCOV288622
INCOV288623
INCOV288624
INCOV288625
INCOV288626
INCOV288627
INCOV288628
INCOV288629
INCOV288630
INCOV288631
INCOV288632
INCOV288633
INCOV288634
INCOV288635
INCOV288636
INCOV288637
INCOV288638
INCOV288639
INCOV288640
INCOV288641
INCOV288642
INCOV288643
INCOV288644
INCOV288645
INCOV288646
INCOV288647
INCOV288648
INCOV288649
INCOV288650
INCOV288651
INCOV288652
INCOV288653
INCOV288654
INCOV288655
INCOV288656
INCOV288657
INCOV288658
INCOV288659
INCOV288660
INCOV288661
INCOV288662
INCOV288663
INCOV288664
INCOV288665
INCOV288666
INCOV288667
INCOV288668
INCOV288669
INCOV288670
INCOV288671
INCOV288672
INCOV288673
INCOV288674
INCOV288675
INCOV288676
INCOV288677
INCOV288678
INCOV288679
INCOV288680
INCOV288681
INCOV288682
INCOV288683
INCOV288684
INCOV288685
INCOV288686
INCOV288687
INCOV288688
INCOV288689
INCOV288690
INCOV288691
INCOV288692
INCOV288693
INCOV288694
INCOV288695
INCOV288696
INCOV288697
INCOV288698
INCOV288699
INCOV288700
INCOV288701
INCOV288702
INCOV288703
INCOV288704
INCOV288705
INCOV288706
INCOV288707
INCOV288708
INCOV288709
INCOV288710
INCOV288711
INCOV288712
INCOV288713
INCOV288714
INCOV288715
INCOV288716
INCOV288717
INCOV288718
INCOV288719
INCOV288720
INCOV288721
INCOV288722
INCOV288723
INCOV288724
INCOV288725
INCOV288726
INCOV288727
INCOV288728
INCOV288729
INCOV288730
INCOV288731
INCOV288732
INCOV288733
INCOV288734
INCOV288735
INCOV288736
INCOV288737
INCOV288738
INCOV288739
INCOV288740
INCOV288741
INCOV288742
INCOV288743
INCOV288744
INCOV288745
INCOV288746
INCOV288747
INCOV288748
INCOV288749
INCOV288750
INCOV288751
INCOV288752
INCOV288753
INCOV288754
INCOV288755
INCOV288756
INCOV288757
INCOV288758
INCOV288759
INCOV288760
INCOV288761
INCOV288762
INCOV288763
INCOV288764
INCOV288765
INCOV288766
INCOV288767
INCOV288768
INCOV288769
INCOV288770
INCOV288771
INCOV288773
INCOV288774
INCOV288775
INCOV288776
INCOV288777
INCOV288778
INCOV288779
INCOV288780
INCOV288781
INCOV288782
INCOV288783
INCOV288784
INCOV288785
INCOV288786
INCOV288787
INCOV288788
INCOV288789
INCOV288790
INCOV288791
INCOV288792
INCOV288793
INCOV288794
INCOV288795
INCOV288796
INCOV288797
INCOV288798
INCOV288799
INCOV288800
INCOV288801
INCOV288802
INCOV288803
INCOV288804
INCOV288805
INCOV288806
INCOV288807
INCOV288808
INCOV288809
INCOV288810
INCOV288811
INCOV288812
INCOV288813
INCOV288814
INCOV288815
INCOV288816
INCOV288817
INCOV288818
INCOV288819
INCOV288820
INCOV288821
INCOV288822
INCOV288823
INCOV288824
INCOV288825
INCOV288826
INCOV288827
INCOV288828
INCOV288829
INCOV288830
INCOV288831
INCOV288832
INCOV288833
INCOV288834
INCOV288835
INCOV288836
INCOV288837
INCOV288838
INCOV288839
INCOV288840
INCOV288841
INCOV288842
INCOV288843
INCOV288844
INCOV288845
INCOV288846
INCOV288847
INCOV288848
INCOV288849
INCOV288850
INCOV288851
INCOV288852
INCOV288853
INCOV288854
INCOV288855
INCOV288856
INCOV288857
INCOV288860
INCOV288861
INCOV288862
INCOV288863
INCOV288864
INCOV288865
INCOV288866
INCOV288867
INCOV288868
INCOV288869
INCOV288870
INCOV288871
INCOV288872
INCOV288873
INCOV288874
INCOV288875
INCOV288876
INCOV288877
INCOV288878
INCOV288879
INCOV288880
INCOV288881
INCOV288882
INCOV288883
INCOV288884
INCOV288885
INCOV288886
INCOV288887
INCOV288888
INCOV288889
INCOV288890
INCOV288891
INCOV288892
INCOV288893
INCOV288894
INCOV288895
INCOV288896
INCOV288897
INCOV288898
INCOV288899
INCOV288900
INCOV288901
INCOV288902
INCOV288903
INCOV289049
INCOV289050
INCOV289051
INCOV289053
INCOV289054
INCOV289055
INCOV289056
INCOV289057
INCOV289058
INCOV289059
INCOV289060
INCOV289061
INCOV289062
INCOV289063
INCOV289064
INCOV289065
INCOV289066
INCOV289067
INCOV289068
INCOV289069
INCOV289070
INCOV289071
INCOV289072
INCOV289073
INCOV289074
INCOV289075
INCOV289076
INCOV289077
INCOV289078
INCOV289079
INCOV289080
INCOV289081
INCOV289082
INCOV289083
INCOV289084
INCOV289085
INCOV289086
INCOV289087
INCOV289088
INCOV289089
INCOV289090
INCOV289091
INCOV289092
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The authors have declared that no competing interests exist.

Author Contributions

Concept and design:  Rajesh P. Karyakarte, Rashmita Das

Acquisition, analysis, or interpretation of data:  Rajesh P. Karyakarte, Rashmita Das, Mansi V. Rajmane, Sonali Dudhate, Jeanne Agarasen, Praveena Pillai, Priyanka M. Chandankhede, Rutika S. Labhshetwar, Yogita Gadiyal, Preeti P. Kulkarni, Safanah Nizarudeen, Sushma Yanamandra, Nyabom Taji, Suvarna Joshi, Varsha Potdar

Drafting of the manuscript:  Rajesh P. Karyakarte, Rashmita Das

Critical review of the manuscript for important intellectual content:  Rajesh P. Karyakarte, Rashmita Das, Mansi V. Rajmane, Sonali Dudhate, Jeanne Agarasen, Praveena Pillai, Priyanka M. Chandankhede, Rutika S. Labhshetwar, Yogita Gadiyal, Preeti P. Kulkarni, Safanah Nizarudeen, Sushma Yanamandra, Nyabom Taji, Suvarna Joshi, Varsha Potdar

Supervision:  Rajesh P. Karyakarte, Rashmita Das

Human Ethics

Consent was obtained or waived by all participants in this study. Institutional Ethics Committee, Byramjee Jeejeebhoy Government Medical College (BJGMC), Pune issued approval BJGMC/IEC/Pharmac/0721233-233

Animal Ethics

Animal subjects: All authors have confirmed that this study did not involve animal subjects or tissue.

References


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