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Some universities and schools in the U.S. are reimposing indoor mask mandates. - The New York Times
Maximizing Fit for Cloth and Medical Procedure Masks to Improve Performance and Reduce SARS-CoV-2 Transmission and Exposure, 2021 | MMWR
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Healthcare News: Health Insurance, Health Studies & Treatments - NBC News | NBC News
Why plague doctors wore those strange beaked masks
I'm Mentally and Physically Exhausted.' Healthcare Workers Battling Coronavirus Are Running Out of Protective Gear | Time
COVID-19 refresher for seniors and people with chronic medical conditions | Department of Public Health | City of Philadelphia
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