Emerg Infect Dis. 2022 Jan;28(1):262-264. doi: 10.3201/eid2801.211817. Epub 2021 Dec 2.
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.
高病例数后，伽马（P. 1）变异严重急性呼吸综合征冠状病毒 2 在巴西出现引起关注的是，以前感染的人可能会再次感染。在巴西亚马逊地区的帕林廷斯对一组冠状病毒疾病病例的调查表明存在家庭传播，但没有发现高比例的再感染。
