1.
J Infect
; 82(5): 186-230, 2021 05.
Artículo
en Inglés
| MEDLINE
| ID: mdl-33271171
RESUMEN
We screened stored samples collected before COVID-19 had been reported in Brazil. 989 samples were tested for SAR-CoV-2 antibodies using two different methods; 16 (1.6%) were positive (7 (43.8%) IgM, 3 (18.8%) IgG and 6 (37.5%) IgG/IgM positive), suggesting SARS-CoV-2 had circulated before the first reported COVID-19 case in Brazil.