In a follow-up to this story, I emailed Dr. Dan Stock to ask him if he had references to the studies he mentioned in that video.
Today he replied and pointed me to this set of links up on his PureHealthMD website. And now I’m pointing them out to you.
Thus far I have only dipped my toe into them. I browsed the “N95 Respirators vs Medical Masks for Preventing Influenza Among Health Care Personnel.” The disappointing conclusion was “Among outpatient HCP, N95 respirators vs medical masks as worn by participants in this trial resulted in no significant difference in the incidence of laboratory-confirmed influenza.” So only do regular masks not work, even significantly better N95 masks don’t work…