Seroprevalence
Cross-sectional study
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
Medicine
Coronavirus disease 2019 (COVID-19)
Health care
Environmental health
2019-20 coronavirus outbreak
Virology
Antibody
Outbreak
Immunology
Disease
Serology
Internal medicine
Pathology
Infectious disease (medical specialty)
Economics
Economic growth
