covid19 aerosol transmission 

"A room, a bar and a classroom: how the coronavirus is spread through the air.

Here is an overview of the likelihood of infection in three everyday scenarios, based on the safety measures used and the length of exposure":

english.elpais.com/society/202

covid19 aerosol transmission 

@fribbledom Interesting, that part about the classrooms never struck me. For most of my school life, classroom sessions were 45 minutes and then it was gtfo break time while the room was ventilated by opening pretty much every window possible. Especially during the winter.

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covid19 aerosol transmission 

@espen
We had alternating 5 and 15 minute breaks, and of the next lesson was in the same room, we could (and mostly did) just stay there. In the later school years we often had two 45 minute lessons of the same topic, so even the teacher stayed in the room. In the 15 minute breaks, we _had_ to go outside. Ventilation according to teacher mood, weather and individual initiative :)
@fribbledom

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