Claim: Wearing masks for the coronavirus "decreases oxygen intake, increases toxin inhalation, shuts down immune system, increases virus risk, scientifically inaccurate, effectiveness not studied."
Fact-check: Debunking 6 claims about masks and COVID-19
Verdict: false
Organisation: PolitiFact
Author: Tom Kertscher
Date published: 2020-06-12T00:00:00