04-05-2020, 01:40 PM
Masks for all is not based on sound data, say these two experts on respiratory protection.
https://www.cidrap.umn.edu/news-perspect...sound-data
https://www.cidrap.umn.edu/news-perspect...sound-data
Different spin on the wearing of masks.
|
04-05-2020, 01:40 PM
Masks for all is not based on sound data, say these two experts on respiratory protection.
https://www.cidrap.umn.edu/news-perspect...sound-data |
« Next Oldest | Next Newest »
|