HIV(17) reported(7) cross-reactivity(7) participant(4) cough(4) SARS-CoV-2 antibodies(4) acute respiratory syndrome(4) detectable(4) asymptomatic infections(4) asymptomatic infection(4) tested(4) Symptoms(4) SARS-CoV-2 antibody(4) COVID-19 case(4) antibody(4) COVID-19(4) Prevalence(4) Coronavirus-2(4) Coronavirus disease 2019(4) Kenya(4) severe acute respiratory syndrome coronavirus 2(3) Co-infections(3) Zimbabwe(3) hepatitis B(3) SARS-CoV-2(3) coronavirus disease(3) Preexisting immunity(3) Mortality(3) Immunity(3) risk(3)