Table 2.

Summary of Included Studies on the Attitude Toward COVID-19 for Vaccination and Its Determinants Among Healthcare Workers, 2021

Author	Attitude Toward COVID-19 for Vaccination	Determinants (Significantly Associated)
Gagneux B et al, 202056	● 76.9% would accept a COVID-19 vaccine. Of these:	● Older age ● Male ● Fear about COVID-19 ● Individual perceived risk and flu vaccination during previous season
Kabamba N et al, 202033	● 27.7% = would get vaccinated if the COVID-19 vaccine was available	● Male healthcare workers ● Being a doctor
Dimitrios P et al, 202145	● High level of acceptance for COVID-19 vaccine = 78.5%	● Age >45 years ● Absence of fear over vaccine safety ● Information received from the Greek public health authorities
Francesco D et al, 202130	● 67% = intended to be vaccinated, ● 26%= were not sure ● 7% = declared refusal	● Being a non-MD health professional ● Using Facebook as main information source about antiSARS-CoV-2 vaccination
Bartosz S et al, 202132	● Significant level of willingness to get vaccinated as compared to the control group = 82.95% vs 54.31%	● Positive history of recommended vaccinations ● Fear of COVID-19 of passing on the disease to relatives ● Depression symptoms in the past week ● Fear of vaccination side effects
Ameerah M et al, 202136	● 50.52% of respondents were willing to have the COVID-19 vaccine, of these: ● Immediate acceptance = 49.7% ● Delayed acceptance = 50.3%	#Acceptance - Being a male healthcare worker - Perceiving a high risk of infection, - Believing that the COVID-19 vaccine should be compulsory for all citizens and - residents in the country
Abas K et al, 202115	Overall attitudes toward vaccination were positive but specific concerns regarding COVID-19 vaccine are prevalent ● Only one-third of respondents were amenable to COVID-19 vaccination immediately ● >1/2 of respondents preferred to defer their decision until reviewing more data ● High percentage of respondents waiting to review more data
Jana Sh et al, 202140	Overall, 57.5% of individuals expressed intent to receive COVID-19 vaccine	#Acceptance - Older - Male - White, or Asian
Rahul Sh et al, 202115	56% = majority of the HCW were not sure or would wait to review safety data before getting vaccinated 11% = will like to wait for 3 months 10% = will like to wait for 6 months, and 20% = will like to wait at least 1 year. 8% = unwilling to take the vaccine at all	#Acceptance - Increased with increasing age, education, and income level # #Acceptance - Decreased among female, Black, Latinx and rural HCWs
Caterina L et al, 202144	Overall, 75% of respondents would get a COVID-19 vaccine	#Acceptance - Younger age (<30 years) - Male - Patients with comorbidities
Padureanu V et al, 202129	69% = agreed with the COVID-19 vaccine	● Fear of getting infected ● Working in a designated hospital
Gasmelseed A et al, 202139	● Accept the newly developed vaccine- 55.5% ● Advocate for newly developed vaccine - 60.1% ● Both accept and advocate for newly developed vaccine - 51.3%	● Female ● Older age ● Presence of chronic illnesses ● Having an allergy
Shikha K et al, 202131	● Low willingness among healthcare workers – 23.4%	● Risk perception ● Preventive COVID-19 infection behaviours ● Willingness to take rapid test
John J et al, 202148	● Showed 67% of junior doctors are willing to accept the COVID 19 vaccine	≠Acceptance ● Adverse reaction from vaccine. ● Female doctors ● Junior doctors who live with their nuclear families
Jorge L et al, 202112	● Between 77.0% and 90.7% of physicians accept COVID-19 vaccination, according to the scenario evaluated where the vaccine’s effectiveness was 60 or 80%, respectively	● Medical speciality ● Having never paid for a vaccine ● Recommending the administration of the vaccine to their parents or people over 70 years ● Dispensing the vaccine to their children (effectiveness of 60% and 80%.
Luka P et al, 202134	59% = intended to vaccinate. Of these: ● 33% = definitively intended to participate in vaccination ● 26% = would probably agree to vaccination	#Acceptance - Older - Male - Physicians - Those who trust official (government) sources
Asaf Z et al, 202142	● 85% = overall rate of acceptance for a COVID-19 vaccine, according to our survey
Maayan Sh et al, 202143	● Dental hygienists demonstrated significant negative attitudes compared to dentists	#Refusal - Unforeseen side effects Female
Stefania D et al, 202138	● 80.9% accepted the vaccine	#Acceptance: Male sex, age over 50, rehabilitation center workers, and occupational COVID-19 exposure #Refusal: vaccine novelty, wanting others to receive it first, and insufficient time for decision-making
Martin W et al, 202149	39.3% of them indicated acceptance of COVID-19 vaccines if available 60.7% indicated non-acceptance of COVID-19 vaccines	#Acceptance - Female - Relative being diagnosed with COVID-19 - Trust in the accuracy of the measures taken by the government in the fight against COVID-19 #Refusal - Concerns about the safety of vaccines and - the adverse side effects of the vaccines
Samar F et al, 202147	21% accepted vaccination 51% of the participants were undecided 28% refused	#Acceptance: - Risks of COVID-19 - Safety and - effectiveness of the vaccine #Refusal: - Absence of enough clinical trials - Fear of side effects of the vaccine
Sabita P et al, 202146	Only just over one-third (38.3%) were willing to be vaccinated	≠Refusal = vaccine safety
Eyad Q et al, 202137	Vaccine acceptance rate in this study was 26.7%	≠ Reasons for hesitancy - Concerns about side effects and distrust of the expedited vaccine production and healthcare policies - Age 30–59 - Previous or current suspected or confirmed COVID-19, - Female ge - Not knowing the vaccine type Authorized in the participant’s country - Not regularly receiving the influenza vaccine.
Anne S et al, 202135	62.9% = would certainly not get vaccinated 37.1% were hesitant, with different degrees of certainty	≠Acceptance - Older - Being a physician - Being vaccinated against seasonal flu