As Amuzo pointed out, I am not an expert. I can only research and read articles from the web. Masks do offer some protection but to think that they will protect you completely from the Corona Virus would be disingenuous at best.
Here are 2 of the articles I was referencing along with the studies listed above.
https://www.businessinsider.com/wuha...fective-2020-1
https://smartairfilters.com/en/blog/...e-coronavirus/