Reminder: Covid is Airborne!

Open windows, open doors, use fans, utilize high-quality filters in HVAC systems, reduce occupancy, reduce interaction time, move activities outdoors, use HEPA systems, measure CO2, and mask up (fit+filter)! https://www.nature.com/articles/d41586-021-00277-8
Don't have money for a HEPA system? Not to worry!

A makeshift fan-filter system often costs one fifth as much as a portable HEPA unit, and can be very effective at removing aerosols from a room.

https://www.wired.com/story/could-a-janky-jury-rigged-air-purifier-help-fight-covid-19/
Even better: build a Corsi box!

-more flow
-less noise
-longer lifetime

See how:
https://www.texairfilters.com/its-all-about-the-air-flow-through-the-filter/
Not sure if your air is sufficiently clean? Try some of these hacks:

https://covidstraighttalk.org/hacks 
Infectious aerosols can build up in the air like smoke. One way to check for sufficient ventilation is to measure the levels of CO2 in a room.

Portable CO2 sensors can help tremendously, and are very easy to use. https://twitter.com/DrEricDing/status/1355337429545324545?s=20
By now, the evidence is clear. Covid is airborne.

The sooner the public knows this, the sooner they can take targeted precautions to reduce transmission.
You can follow @endCOVID19.
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