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• W4311313462 abstract "Contact tracing plays an essential role in mitigating the impact of an epidemic. During the COVID-19 pandemic, studies of those who have been in close contact with confirmed cases offer critical insights to understand the epidemiological characteristics of SARS-CoV-2 better. This study conducts a meta-analysis of existing studies' infection rates and affecting factors.We searched PubMed, Web of Science and CNKI from the inception to April 30 2022 to identify systematic reviews. Two reviewers independently extracted the data and assessed risk of bias. Meta-analyses were conducted to calculate pooled estimates by using Stata/SE 15.1 software.There were 47 studies in the meta-analysis. Among COVID-19 close contacts, older age (RR = 1.94, 95% CI: 1.70, 2.21), contacts in households (RR = 2.83, 95% CI: 2.20, 3.65), and people in close contact with symptomatic infections (RR = 3.62, 95% CI: 1.88, 6.96) were associated with higher infection rates.On average, each primary infection corresponded to 5.8 close contacts. Among COVID-19 close contacts, older age and contacts in households were associated with higher infection rates, and people in close contact with symptomatic infections had three times higher risk of infection compared to people in close contact with asymptomatic infections. In general, there are significantly more studies from China about close contacts, and the infection rate among close contacts was lower compared to other countries." @default.
• W4311313462 created "2022-12-25" @default.
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• W4311313462 date "2022-12-13" @default.
• W4311313462 modified "2023-10-17" @default.
• W4311313462 title "Infection rate and factors affecting close contacts of COVID‐19 cases: A systematic review" @default.
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• W4311313462 doi "https://doi.org/10.1111/jebm.12508" @default.
• W4311313462 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36513958" @default.
• W4311313462 hasPublicationYear "2022" @default.
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