High case counts after the Gamma (P. 1) variant of severe acute respiratory syndrome coronavirus 2 emerged in Brazil raised concerns that previously infected persons might become reinfected. Investigation of a cluster of coronavirus disease cases in Parintins, in the Brazilian Amazon, suggested household transmission but did not identify high rates of reinfection.
Keywords: 2019 novel coronavirus disease; Brazil; COVID-19; Gamma variant; P.1 variant; SARS-CoV-2; coronavirus disease; reinfection; respiratory infections; severe acute respiratory syndrome coronavirus 2; viruses; zoonoses.