The Science and History of Masks in Medicine

https://open.lbry.com/@tyrantsend:e/THE-SCIENCE---HISTORY-OF-MASKS-IN-MEDICINE:7?r=3VdTQq9rKttPgyh5L6Ngjzx1fSoJQebc

This is not my video.

This video was put out here: https://themodelhealthshow.com/maskfacts/
along with references to the info provided in the video.

Please share.