I don’t know how upset I should be because I’m not sure if this can actually play out. I’m actually unsure what the health and labour rules are here. I’m looking into getting a doctor’s note and talking to lawyers friends. I’m just fuming upset now. Why the fuck do you care that I mask?
I would basically just ask google what title your [place of work (hospital, school, etc)] falls under the ADA, to see if it applies.
Here’s an ADA faq with a link to their knowledgebase at the bottom.
https://adata.org/top-ada-frequently-asked-questions