Tom Lieber's Microblog

May 26, 2020

Your mask slows down the air coming from your mouth, significantly reducing the chance you’ll infect someone else—important if you’re among the ~40% of infected people who are asymptomatic.

But if someone coughs on you without a mask, slowing down the air millimeters from your face is not very effective. That’s why everyone needs a mask.

Thankfully, it takes a few minutes of exposure to someone breathing deeply or speaking to build up enough of the virus to be a risk to you, so passing someone on the street (even a runner!) is not as dangerous as it may seem in the moment.

Circulated air is a big risk multiplier. Congregate outdoors with masks. Open windows.

The more you know, the more appropriately you can react!

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