Danish RCT says: "The recommendation to wear surgical masks to supplement other public health measures did not reduce the SARS-CoV-2 infection rate among wearers by more than 50%..."

[Gert van der Hoek]

Conclusion:

The recommendation to wear surgical masks to supplement other public health measures did not reduce the SARS-CoV-2 infection rate among wearers by more than 50% in a community with modest infection rates, some degree of social distancing, and uncommon general mask use. The data were compatible with lesser degrees of self-protection.


See also: ACP - Effectiveness of Adding a Mask Recommendation to Other Public Health Measures to Prevent SARS-CoV-2 Infection in Danish Mask Wearers

[Gert van der Hoek]

- Study seems to be inconclusive?

- No single intervention is perfect?

[Gert van der Hoek]

"The primary outcome was SARS-CoV-2 infection in the mask wearer".

IMHO wearing masks is about protecting others?

[Gert van der Hoek]

Review of the Danish study, highly recommended:

Here's How to Think About the Danish Mask Study

— What the DANMASK-19 trial showed and didn't show about mask use and COVID-19


by Vinay Prasad, MD, MPH November 18, 2020