Requirement to wear masks in hospitals may have had little impact on COVID-19 transmission during omicron wave

Requirements to wear surgical masks in a large London hospital during the first 10 months of omicron activity (December 2021 to September 2022) made no discernible difference to reducing hospital-acquired SARS-CoV-2 infections, according to new research being presented at this year’s European Congress of Clinical Microbiology & Infectious Diseases (ECCMID) in Copenhagen, Denmark (15–18 April).

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