It's an old joke, repeated every year around nurses' stations, examination rooms, and operating theaters: Whatever you do, don't get sick in July.
That's when hundreds of just-graduated medical students begin their residencies. The logic goes that, come summer, you're all but guaranteed to be treated by a novice physician, especially in teaching hospitals. Better to wait a few months, until the new docs have settled in a bit, to be seen about that suspicious lump.
