A device, foreground left, measures whether air ventilation is sufficient at an okonomiyaki restaurant in the Osaka Prefecture city of Sakai, on Feb....
Virus particles emitted from people's mouths and noses when they cough or sneeze, among other actions, become included in aerosols; they can travel long distances on air currents, and sometimes remain in the air for a long time....
Aerosol transmission of a virus is when people breathe those particles in....
综合
每日新闻-最新
2021-06-28 00:00:00.0