In some states, wearing masks has been compulsory in certain places. And, even if not compulsory, many states have been recommending the practice. Ironically, despite all this advocating for wearing masks, at least 18 states have laws on the books that make it a crime to do so in public. Of course, those laws are not being enforced these days.
Here is a link to an Op-ed that I published in The Wall Street Journal late last month that looks at state anti-mask law and some judicial opinions addressing them. I hope you can check it out:
https://www.coverageopinions.info/MustWearaMask.pdf