I have read many studies on mask wearing......................but there is simply not enough long term data in the Western World so in those studies it could be argued either way
In Japan mask wearing has been the "norm" for decades, actually almost a century, just after the Spanish Flu of 1918 was when wearing a mask became a cultural "norm", an outward sign you were protecting others and yourself from a possible infection, more "normal" during flu season but some chose to wear a mask year round
In Japanese culture shaking hands and cheek kissing wasn't part of their social customs, so saying mask wearing was all that prevented the spread of a flu is wrong, but looking at their numbers is a real testament that a primarily masked population did make a difference
Japan has 20 deaths from covid per 1 million in population
US has 903 deaths from covid per 1 million in population
Is the difference just masks, of course not, is some of it masks, of course
So whats one life worth...............