Yes, Lance Armstrong's cancer resolved itself on its own. Dick Cheney's heart disease is doing a bang-up job unclogging his arteries. Bacterial infections the world over are magically eradicating themselves in the absence of antibiotics. And small pox is no longer a factor - or even in existence - in the world because the millions it killed in order to perpetuate itself led to some severe self-searching analysis, depression, and a decision by the virus to commit mass suicide.
This list of diseases cured, prevented, and held at bay by medicine is so long that not even the letsrun message board could contain it.