Response to a FOIA request contradicting the claims that masks are known to be effective for "CV19 transmission" … "CDC is not aware of any randomized control trials that show that masks or double masks or cloth face coverings are effective against COVID-19." pic.twitter.com/WDvZns9kGx
— Karina #NikolResign (@KarinaRa1776) April 7, 2021
