If somebody is running a fever, has a cough, or has been notified that they've been around somebody who had/has COVID-19 they're probably getting tested if they have the ability to. That's how contact tracing is supposed to work, and it's a recipe for high test numbers/low-ish positives.
There was somebody who was ID'd as testing positive for it in one of the buildings at my job and I bet everybody who came in contact with that person going back a month went out and got a brain tickler. That's potentially a few dozen tests being performed because of one positive case. I wouldn't necessarily break it down to a binary proposition of hypochondriacs vs. tests being faulty.
On the fence about this one, and usually I'm a "don't trade for someone else's problems" kind of guy. He is intriguing and I'm not sold on Thomas yet, considering the small sample size he has generated over the last couple of seasons.