3 ms·
That article linked to this article https://www.science.org/doi/10.1126/science.abi9069 https://www.science.org/doi/10.1126/science.abi9069 on a controlled rand
by relaxing 5y ago
That article linked to this article https://www.science.org/doi/10.1126/science.abi9069 https://www.science.org/doi/10.1126/science.abi9069
on a controlled randomized study that claims "Mask distribution and promotion was a scalable and effective method to reduce symptomatic SARS-CoV-2 infections."