Here's an important tip that didn't make it to the video: you can reuse your masks. Stanford University research shows that you can just pop them in the oven at 70C (160F) for 30 mins, and they're good to go!https://t.co/CRe0l7JR5b pic.twitter.com/Vj4S6Unn3i

— Jeremy Howard (@jeremyphoward) March 25, 2020