Do masks work? No possible way says filtration expert Tyson Gabriel. He'd bet the farm on it.

Do masks work? - by Steve Kirsch - Steve Kirsch's newsletter (substack.com)

"Tyson Gabriel is the industrial hygienist that made this 1 hour video on mask wearing entitled “Just wear a mask or you’ll kill Grandma.” It’s in 6 parts, but all 6 parts are in the 1 hour video. It’s entertaining to watch."