The reason I say this is that most
Doctor interns, and
medical school students start work in
July.
Note that you are not going to get treated by a newbie doctor without a supervising doctor and you get asked first if you don't mind, so don't panic. They're not going to give you the wrong medication or anything.
The real reason is that for the staff there, Hell is the only way to describe it. There usually isn't an orientation tour, so interns get lost, the nurses get overworked, so your chart might get lost.