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Science Daily

2020-06-28, 01:14
Face masks critical in preventing spread of COVID-19

A study has found that not wearing a face mask dramatically increases a person's chances of being infected by the COVID-19 virus.


https://www.sciencedaily.com/releases/20...172200.htm
www.chinaphonearena.com > Off The Wall > Tech & Science > [Science Daily] Face masks critical in preventing spread of COVID-19