I was censored back in September 2020 by Facebook for posting a study by the New England Jounral of Medicine saying masks could potentially slow the spread of COVID-19. Back then it was "disinformation" to say a fitted N95 mask could help slow the spread of an airborne pathogen:

https://www.facebook.com/bboyneko/posts/pfbid02oBFM6afwQsHYh66Cn9kGhA16RxNu9USu33h45i3tZ9TGFg2oinDDQmmtjzWUopcfl