Here's why masks don't work, aside from the obvious, here's something less so:
Covid: Performance study of microplastic inhalation.
https://www.sciencedirect.com/science/article/pii/S0304389420329460
Micro(nano)plastics a threat to human health?
https://www.sciencedirect.com/science/article/abs/pii/S2468584417300235
Emergence of nanoplastic in environment:
https://pubs.acs.org/doi/10.1021/acs.est.8b05512
Nanoplastic in the environment - sources, fates and effects
https://www.sciencedirect.com/science/article/abs/pii/S0048969716309731
Insights into nanoplastic and human health:
https://www.sciencedirect.com/science/article/pii/S2095927320305247
Why Ron Paul won't wear a mask:
https://youtu.be/26pLFGcDRbM
(post is archived)