US election 2020: Fact-checking Trump and Biden town hall events

Trump: "Just the other day, they came out with a statement that 85% of the people that wear masks catch it."
Verdict: We can find no evidence to support this claim.

The president may have been referring to a study by the US Centers for Disease Control (CDC) that found adults with Covid-19 were more than twice as likely to have reported eating at a restaurant before getting ill, compared to those without the disease.

The study found that 85% of the 150 respondents with coronavirus said they had always or often wore a mask in the two weeks before getting ill.

So the president misinterprets this - it does not show that 85% of people that wear masks in general, catch coronavirus.

The CDC has said: "The interpretation that more mask-wearers are getting infected compared to non-mask wearers is incorrect."