Contagion is a different type of disease-disaster movie than we’re used to seeing: Simple germs more or less comprise the boogeyman, and the concept is actually steeped in plausibility. But the Steven Soderbergh thriller follows a long line of movies in which a disease or all-out epidemic wreaks havoc on the human race. Here are some of the most notable “disease-ter” flicks, not to be confused with the zombie genre or tearjerkers about one man’s losing battle with, say, AIDS. Thus no Night of the Living Dead. Or Philadelphia.