COVID-19(34) SARS-CoV-2(19) Epidemiology(14) Infection(12) Prevalence(11) random(10) Health(10) estimate(10) antibody(9) participant(9) Risk factors.(8) Health care seeking behavior(8) population surveillance(8) risk(8) herpes zoster(8) surveillance.(8) Health Surveys(8) Follow-up(8) Pain(8) determine(8) Epidemiologic methods(8) medical records(8) COVID-19 infection(7) IgG(7) IMPROVE(6) predict(6) unique(6) demographics(6) Laboratory(6) venous blood(6)