biostudies-literatureUnknown2(1)Zhang C<h4>Background</h4>Global evidence on the transmission of asymptomatic SARS-CoV-2 infection needs to be synthesized.<h4>Methods</h4>A search of 4 electronic databases (PubMed, EMBASE, Cochrane Library, and Web of Science databases) as of January 24, 2021 was performed. Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed. Studies which reported the transmission rate among close contacts with asymptomatic SARS-CoV-2 cases were included, and transmission activities occurred were considered. The transmission rates were pooled by zero-inflated beta distribution. The risk ratios (RRs) were calculated using random-effects models.<h4>Results</h4>Of 4923 records retrieved and reviewed, 15 studies including 3917 close contacts with asymptomatic indexeInfectious medicine11-18https://www.ebi.ac.uk/biostudies/studies/S-EPMC9757919biostudies-literatureTransmission risk of asymptomatic SARS-CoV-2 infection: a systematic review and meta-analysis.PMC9757919Zou HXia YQian HZQian FZheng SJiang QLi PDeng LWang HLi XLu HZhou CZhang XWang TGao YZhang CXu WfalseTransmission risk of asymptomatic SARS-CoV-2 infection: a systematic review and meta-analysis.<h4>Background</h4>Global evidence on the transmission of asymptomatic SARS-CoV-2 infection needs to be synthesized.<h4>Methods</h4>A search of 4 electronic databases (PubMed, EMBASE, Cochrane Library, and Web of Science databases) as of January 24, 2021 was performed. Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed. Studies which reported the transmission rate among close contacts with asymptomatic SARS-CoV-2 cases were included, and transmission activities occurred were considered. The transmission rates were pooled by zero-inflated beta distribution. The risk ratios (RRs) were calculated using random-effects models.<h4>Results</h4>Of 4923 records retrieved and reviewed, 15 studies including 3917 close contacts with asymptomatic indexe2023-01-01T00:00:00Z2023 Mar2026-05-10T04:49:45.577Z2025-04-05T13:02:32.308ZS-EPMC97579193801377710.1016/j.imj.2022.12.001