Masks4All is a movement to get people to embrace the scientific evidence and wear homemade masks in public to slow the spread of COVID-19. Jeremy Howard started this site and is leading the charge of #Masks4All in the U.S. #Masks4All was originally started by Petr Ludwig in the Czech Republic.

Jeremy wrote a viral Washington Post article on Saturday about why Americans need to wear homemade masks. This article sparked a nationwide grassroots movement in the U.S. and led to President Trump and Dr. Fauci publicly commenting on the use of homemade masks yesterday. The U.S. CDC has also announced that it's now reconsidering its mask guidelines.