FRIDAY, Aug. 7, 2020 — When it comes to Face Masks, not all are equally effective, a new study finds. Duke University researchers developed a way of testing various types of masks to see which did the best job of stopping droplets coming from people’s mouths, preventing spread of the new coronavirus. They relied on […]
Source
This post first appeared on Fav Store – Herbal Products And News, please read the originial post: here