Скачать или смотреть Do Surgical Masks Protect You from Viruses?

You often see people wearing surgical masks or respirators during flu season, but do they even do anything?

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Sources:
http://journals.plos.org/plospathogen...
https://jamanetwork.com/journals/jama...
http://www.ajicjournal.org/article/S0...
https://academic.oup.com/cid/article/...
https://www.mayoclinic.org/diseases-c...
https://www.fda.gov/MedicalDevices/Pr...
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https://en.wikipedia.org/wiki/File:Bl...
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https://en.wikipedia.org/wiki/File:Sw...
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