Cloth (e.g. cotton or gauze) masks are not recommended under any circumstance. https://mobile.twitter.com/ichiro_jeffrey/status/1245330671960088576 https://i.imgur.com/WvTjIta.jpg https://i.imgur.com/iPkledE.jpg 元ソース https://www.who.int/docs/default-source/documents/advice-on-the-use-of-masks-2019-ncov.pdf
What the U.S. and Europe Can Learn From Asia’s Two-Month Virus Battle https://www.bloomberg.com/amp/news/articles/2020-03-12/coronavirus-lessons-for-the-world-from-ground-zero-of-asia
>On the other hand, Japan drew criticism for not testing enough people, which raises the prospect of scores of undetected infected people remaining un-quarantined and spreading the virus more widely. >一方、日本は十分な数の人を検査していないという批判を集めました。これにより、多くの未検出の感染者が隔離されずにウイルスを広める可能性が高くなります。
ABC News "We have a simple message for all countries: Test, test, test. Test every suspected case."
"You cannot fight a fire blindfolded, and we cannot stop this pandemic if we don't know who is infected," WHO Director-General Tedros Adhanom Ghebreyesus says.