[Thread] Teachers- air quality in classrooms is important (& so are confidence & comfort)

1. Empowerment: understanding risks & positive action to keep safe 1/ #schools #Covid19 https://www.bmj.com/content/370/bmj.m3223
Toolkits & posters for safety
🦠 MASK
🦠 AIR
🦠 DISTANCE
#COVID19 #CleanAir 3/
http://covidstraighttalk.org 
Physics- cross-ventilation clears this room in 7 minutes, without cross-ventilation it takes 45 minutes 6/
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