Thread by @akm5376

A short thread explaining #airborne precautions for a #layered approach of mitigation against #COVID19
Keep in mind that multiple layers is a key need. The more layers, the lower your risk 1/

2) Source elimination is always the first step we think of when dealing with an #airborne problem - no risk without an actual source in the space.
Again, these steps need not be perfect, but they reduce the chances of an infectious person being in the room.

3) Source control - when we cannot eliminate the source, we try to control it. It could be direct - like masks, use packed lunches, and it could be indirect like keeping a control on community levels using vaccination and surveillance like waste water testing

4) Dilution through ventilation - if we can lower the concentration of virus bearing particles in the air you are breathing, you can reduce the risk and there are a ton of ways - simple to complex, of accomplishing this.

5) Increasing ventilation may not always be an option. Or, you could have spaces with greater risk when you want more layers, over the ventilation. Here you need filtration - in the HVAC, local air cleaners, personal protection with respirators, and upper room UVGI

6) You need multiple layers; no one measure can be perfect. Some measures can contribute under multiple headings.
These are measures that work against other #airborne threats, and they can mitigate against #SARSCoV2
We can deal with #airborne. \end