A Face Mask

We wear a face mask in public when we catch a cold.




And we use it to prevent colds.
Especially it is useful to prevent colds in the crowded trains.


So the people who  wear a face mask are not seriously ill in many case.






風邪をひいたとき、風邪予防にマスクを使ってます。
海外だとよっぽどの保菌者と間違われそうですが。。

私の場合、満員電車では、マスク必須です。