Background::Asymptomatic or symptomatic infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) can be followed by reinfection. The protection conferred by prior infection among coronavirus disease 2019 (COVID-19) patients is unclear. We assessed the incidence of SARS-CoV-2 reinfection and the protection effect of previous infection against reinfection.Methods::We searched PubMed, EMBASE, Cochrane, Scopus, Web of Science, and ClinicalTrials.gov for publications up until the end date of May 1, 2021. The reinfection rate of recovered patients and the protection against reinfection were analyzed using meta-analysis.Results::Overall, 19 studies of 1096 reinfection patients were included. The pooled reinfection rate was 0.65

作者：Mao Yinjun；Wang Weiwei；Ma Jun；Wu Shanshan；Sun Feng

来源：中华医学杂志英文版 2022 年 135卷 2期