论文信息 - Association Between Universal Masking in a Health Care System and SARS-CoV-2 Positivity Among Health Care Workers.

Association Between Universal Masking in a Health Care System and SARS-CoV-2 Positivity Among Health Care Workers.

This study describes SARS-CoV-2 PCR test positivity among health care workers before, during, and after implementation of a policy requiring universal masking of all health care workers and patients in a large health care system in Massachusetts.

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