COVID-19	coronavirus disease 2019
SARS-CoV-2	severe acute respiratory syndrome coronavirus 2
WHO	World Health Organization
BSL	biosafety level
PCR	polymerase chain reaction
RBD	receptor-binding domain
NTD	N-terminal domain
ACE2	human angiotensin-converting enzyme 2
ELISA	enzyme-linked immunosorbent assay
LFA	lateral flow immunoassay
CLIA	chemiluminescent immunoassay
FDA	U.S. Food and Drug Administration
IU	international units
BAU	binding antibody units
CI	confidence interval
aOR	adjusted odds ratio
aHR	adjusted hazard ratio