Jul 17, 2020
New normal? ~ COVID-19 Update 16: Effectiveness of surgical masks for prevention
https://youtu.be/XG1Du-GOJs0
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seen from Italy
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seen from United States
seen from Syria
New normal? ~ COVID-19 Update 16: Effectiveness of surgical masks for prevention
https://youtu.be/XG1Du-GOJs0
Is COVID-19 an airborne disease? | MedMastery Explains