Ещё раз про маски, очень хорошее ревью от экспертов (English):

http://www.cidrap.umn.edu/news-perspective/2020/04/commentary-masks-all-covid-19-not-based-sound-data?fbclid=IwAR1h-C1dYS1-cVkoHG7pjAv4qPJ9uFiPFaFA7hzWRZak3JjembPDR4_xuNQ

„Cloth masks as PPE
A randomized trial comparing the effect of medical and cloth masks on healthcare worker illness found that those wearing cloth masks were 13 times more likely to experience influegnza-like illness than those wearing medical masks.“

#коронавирус