There's another facet to this that I went through last winter. I spent about a week fighting pneumonia. After I spiked a temperature of 104(F), I went in get it checked out. After an hour or so, the GP sent me off to the emergency room to get a quick checkout with the diagnostic equipment they had there. That solidified the diagnosis of pneumonia (with some speculation that it was a legionella variant).
The interesting bit happened then, when they were deciding which antibiotic they wanted to use. They were most interested in whether there was any chance I'd acquired the bacteria in any medical setting (hospital, doctors office, clinic...). Once they'd decided that I almost certainly had acquired it in a "normal" environment, they sent me home with what they called the "grand daddy" of antibiotics for pneumonia. Levafloxacin. It seems like medical establishments are bad for you, beyond it being where all the sick people are.
By the way, the medical establishment was the Mayo Clinic.