[Horza]

Originally Posted by G13 [You must be logged in to view images. Log in or Register.]

https://www.acpjournals.org/doi/10.7326/M20-6817

Objective:
To assess whether recommending surgical mask use outside the home reduces wearers' risk for SARS-CoV-2 infection in a setting where masks were uncommon and not among recommended public health measures.