Ad5-nCoV	Cansino Biologics COVID-19 vaccine (against ancestral strains)
ALT	Alanine transaminase
AMV	Assisted mechanical ventilation
BA.2	Omicron sub-lineage
BA.5	Omicron sub-lineage
BMI	Body Mass Index
BNT162b2	Pfizer Bio-NTech COVID-19 vaccine (against ancestral strains)
BQ.1	Omicron sub-lineage
BW.1	Omicron sub-lineage
CDC	Centers for Disease Control and Prevention, USA
CFR	Case fatality rate
ChAdOx1-S/nCoV-19 AZD1222	University of Oxford/Astra Zeneca’s COVID-19 vaccine (against ancestral strains)
CI	Confidence interval
CIGB-66/Abdala	COVID-19 vaccine developed by Centro de Ingeniería Genética y Biotecnología del Ministerio de Salud Pública (Cuba)
CKD	Chronic kidney disease
COPD	Chronic obstructive pulmonary disease
COVID-19	Coronavirus disease 2019
CPK	Creatine phosphokinase
CVD	Cardiovascular disease
DM	Diabetes Mellitus
FiO2	Fraction of inspired oxygen (from a gas mixture)
Gam-COVID-Vac/Sputnik	Gamaleya Research Institute’s COVID-19 vaccine (against ancestral strains)
HR	Hazard Ratio
HT	Systemic hypertension
ICU	Intensive care unit
IMSS	Instituto Mexicano del Seguro Social
IS	Immunosuppression
LDH	Lactate dehydrogenase
MR	Crude Mortality rate
mRNA	Messenger RNA
Ob	Obesity
OECD	Organization for the Economic Cooperation and Development
OR	Odd Ratio
RR	Relative risk
RT-PCR	Reverse transcription-polymerase chain reaction test
SARS-CoV-2	Severe Acute Respiratory Syndrome Coronavirus 2
SpO2	Oxygen saturation
XBB.1	Omicron sub-lineage
yo	Years old