People who really don't know squat about how respirators work are coming up with 3D printing designs, sewing masks out of furnace filter paper, trying to find substitutes for the 3M N95 models 1860 (medical) and 8210 (general use) disposable paper masks.

We proved a medical condition via legitimate doctors note expressing carpet is not do able due to allergies. 

Going back to when you converted that property to rental, if you had to do that because you moved for a job or medical related reason then you may be able to get an amount of the gain tax free prorated by the months you lived there.  

I'm currently renting an apartment and my roommate is off to medical school this summer.

One of my rentals is in a college town that I rent to Medical students. 

I offered monthly pricing during the COVID-19 closings for monthly rentals to medical personnel. 

And if you haven't lived there for two years yet then you would have to qualify for one of the exclusions (job related transfer or medical situation, or unforeseen event). 

As far as your tenant being safe in the health care industry, as strange as it sounds, many doctors and nurses in the US are getting laid off right now.

I will soon take up a Medical Laboratory Scientist travel job with the intent to fund more real-estate buying and achieve my ultimate goal of not having to trade time for money. 

Or is it a medical debt from a few years ago when their child got sick with cancer that they just haven't been able to keep up with and therefore has dragged down their credit?