For most of us, measles and whooping cough are diseases of the past. You get a few shots as a kid and then hardly think about them again. But that’s not the case in all parts of the world — not even parts of the U.S. As an interactive map from the Council on Foreign Relations illustrates, several diseases that are easily prevented with vaccines have made a comeback in the past few years. Their resurgence coincides with changes in perceptions about vaccine safety.