Do Face masks work’?

マスクで感染予防は根拠なし
WHOが新指針で改めて強調

2020/4/7

Can a face mask protect me from coronavirus? Covid-19 myths busted

Claim: ‘Face masks don’t work’
Wearing a face mask is certainly not an iron-clad guarantee that you won’t get sick – viruses can also transmit through the eyes and tiny viral particles, known as aerosols, can penetrate masks. However, masks are effective at capturing droplets, which is a main transmission route of coronavirus, and some studies have estimated a roughly fivefold protection versus no barrier alone (although others have found lower levels of effectiveness).

If you are likely to be in close contact with someone infected, a mask cuts the chance of the disease being passed on. If you’re showing symptoms of coronavirus, or have been diagnosed, wearing a mask can also protect others.

マスク有効説が増えてきたねえ、英語圏でも。



Japanese chemistry professor shows why three kinds of masks could be effective against the virus


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