https://articles.mercola.com/sites/articles/archive/2020/12/03/efficacy-of-surgical-masks.aspx
"...The first randomized controlled trial of more than 6,000 individuals to assess the effectiveness of surgical face masks against SARS-CoV-2 infection found masks did not statistically significantly reduce the incidence of infection..."
Landmark Study Finds Masks Are Ineffective
The first randomized controlled trial found masks did not statistically significantly reduce the incidence of infection.
https://articles.mercola.com/sites/articles/archive/2020/12/03/efficacy-of-surgical-masks.aspx