Claim: Landmark Danish study shows face masks have no significant effect.
Fact-check: Danish study on mask efficacy only tells us half the story - Full Fact
Verdict: a danish study found the covid-19 infection rate was lower among mask-wearers than non-mask wearers but not significantly so. however this is not proof that masks don't have a significant effect, as the study didn't look at whether mask-wearing protects others by stopping wearers from exhaling the virus.
Organisation: Full Fact
Author: Abbas Panjwani
Date published: 2020-11-24T00:00:00