Nope, it was his opinion, based on his entire career. Masks keep people from infecting others. That has ALWAYS been the story. If you are not sick, the mask is a placebo. That placebo is now used to control our economy.
Honestly, do you think the "facts" have remained constant on this? In either direction? I just posted how the CDC is now saying don't worry about surfaces. I'm pretty sure it wasn't too long ago we were told it could last for hours on a surface. The entire nation hoarded wipes. For apparently no reason.
There is still a lot of truth to come out about all of this mess.