Meta-analysis
Coronavirus
Confidence interval
Serology
Pandemic
Systematic review
Medicine
Observational study
Transmission (telecommunications)
Coronavirus disease 2019 (COVID-19)
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
Internal medicine
MEDLINE
Virology
Immunology
Disease
Biology
Antibody
Infectious disease (medical specialty)
Biochemistry
Electrical engineering
Engineering
