Follow CDC’s recommendations for using a facemask.
CDC does not recommend that people who are well wear a facemask to protect themselves from respiratory diseases, including COVID-19.
Facemasks should be used by people who show symptoms of COVID-19 to help prevent the spread of the disease to others. The use of facemasks is also crucial for health workers(https://www.cdc.gov/coronavirus/2019-nCoV/hcp/infection-control.html) and people who are taking care of someone in close settings(https://www.cdc.gov/coronavirus/2019-ncov/hcp/guidance-home-care.html) (at home or in a health care facility).
Prevention, Treatment of Coronavirus Disease 2019 (COVID-19) | CDC
https://www.cdc.gov/coronavirus/2019-ncov/about/prevention-treatment.html
CCD(アメリカ疾病予防管理センター) より
via
Stop buying masks, it does not prevent coronavirus - US DoH -
https://www.gizchina.com/2020/03/03/stop-buying-masks-it-does-not-prevent-coronavirus-us-doh/
(GizChina)
症状がある人が感染を広げない為には有効
もちろん医療従事者には必要
そもそもマスクが手に入らないからどうしようもない
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