つけないよりまし

マスク着用効果に関するメタリサーチ　「効果は小さいがまあ着用しておこう」がFA　https://t.co/il9nKzIi8L　ウイルス防御については無効でコンセンサス。伝搬防止については有効無効の研究が入り乱れるが有効説でも厳格な着用義務下でRを12%を低下させる等小さなもの。エビデンスも弱い。

— Spica (@Kelangdbn) April 25, 2021

 

 He pointed us to a 2020 paper he co-authored, which concluded that “wearing face masks may reduce primary respiratory infection risk probably by 6–15%.” The article also notes that “COVID-19-specific studies are required.”

A pre-print (not yet peer-reviewed) study from UK researchers found that “a stricter mask-wearing policy”, by which they mean “mandatory in most or all shared/public spaces”, reduced the R number by 12 per cent.

つけないよりまし、って感じかな？