9 ms·

I think that stat came from a chart in this article https://yourlocalepidemiologist.substack.com/p/a-quick-note-on-masks-and-cdc-guidance https://yourlocalepide

I think that stat came from a chart in this article https://yourlocalepidemiologist.substack.com/p/a-quick-note-on-masks-and-cdc-guidance https://yourlocalepidemiologist.substack.com/p/a-quick-note-...

paulcole 5y ago
Also this one: https://www.axios.com/n95-mask-protection-covid-958039c9-07f1-45a1-81e7-b7436707fee5.html https://www.axios.com/n95-mask-protection-covid-958039c9-07f...