Seroprevalence of SARS-CoV-2 IgG antibodies among health care workers prior to vaccine administration in Europe, the USA and East Asia: A systematic review and meta-analysis.

EClinicalMedicine · 2021 · PMC7938754 · PMID 33718853

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an increasing trendno p-value reported

The results indicate an increasing trend in the overall seroprevalence among HCWs over the months from February to September 2020.

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