他人にうつさないようにマスクを！と

Hiroshi Nishiuraさんがリツイート

Nonsense to say that masks can't block aerosols, we used exactly the same device to show that masks can block aerosols in this publication, we just have to recognise that they won't be 100% effective https://t.co/nXJOKLVTvk

— Ben Cowling (@bencowling88) August 8, 2021

他人に移さない効果はあるわけですね。