Downwards arrow56% lower risk of infection—Cloth masks
Downwards arrow66% lower risk—Surgical masks
Downwards arrow83% lower risk—N95/KN95 respirators
https://twitter.com/DrEricDing/status/1491862877405429763(http://www.autoadmit.com/thread.php?thread_id=5029474&forum_id=2#43949502)