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 Jun 18;13(1):64. doi: 10.1186/s13756-024-01422-4. ABSTRACT BACKGROUND: In the initial phase of the SARS-CoV-2 pandemic, masking has been widely accepted in …