Claim: The risk of transmitting Covid-19 from an unmasked person to an unmasked person is 90%. From an unmasked person to a masked person it is 30%. From a masked person to an unmasked person it is 5%. From a masked person to a masked person it is 1.5%.
Fact-check: Figures in viral mask graphic aren't substantiated - Full Fact
Verdict: while evidence supports wearing masks to reduce the transmission of covid-19, these figures are unsubstantiated.
Organisation: Full Fact
Author: Abbas Panjwani
Date published: 2021-12-01T00:00:00