Use a CO2 monitor during busy crowded times in public indoor spaces to check ventilation. Fix it to target 600 ppm or less, and you SHOULD eliminate COVID-19 aerosol transmission. The evidence in a thread. 1/
An indoor air quality expert uses calculations on air and science on threshold rebreathed fraction to calculate 650 ppm as the transmission threshold under reasonable assumptoms. 2/ https://twitter.com/CorsIAQ/status/1315550910194438146?s=20">https://twitter.com/CorsIAQ/s...
A Taiwan study finds 600 ppm is good enough to halt TB transmission. 3/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7217216/">https://www.ncbi.nlm.nih.gov/pmc/artic...
Effect of ventilation improvement during a tuberculosis outbreak in underventilated university...

The role of ventilation in preventing tuberculosis (TB) transmission has been widely proposed in infection control guidance. However, conclusive evidence is lacking. Modeling suggested the threshold...

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7217216/
If we ventilate enough, the concentration of virus, assuming someone infectious is present, will drop enough that a little social distancing will BLOCK aerosol transmssion. If we pervasively check ventilation in public, indoor, spaces, we can CRUSH COVID-19. 4/4
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