I have a family member with severe asthma that cannot wear the N95 and most other masks.  His wife made him a homemade mask that he can breathe through but  like most of these, highly doubt it would keep out the virus.  Fortunately, he's staying at home. Good reminder on the ADA.  I think many people are going to have to consider that.  Unfortunately, it may mean they "accommodate" you to a lower paying position as a result.