Association of institutional masking policies with healthcare-associated SARS-CoV-2 infections in Swiss acute care hospitals during the BA.4/5 wave (CH-SUR study): a retrospective observational study.

Antimicrob Resist Infect Control · 2024 · PMC11184728 · PMID 38886813

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a slightly increasing trendno p-value reported

Conversely, in institutions without policy switch, the percentage of healthcare-associated SARS-CoV-2 fluctuated with a slightly increasing trend until mid August (Fig. 2 ).

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