Why are diseases such as measles beginning to reappear?

Answer 1

Some diseases are seen in larger numbers than before for a number of reasons. People forget just how bad they used to be and the after effects of some seemed not too bad. Measles can cause bacterial infection in the lungs (pneumonia) and the brain (encephalitis).
It's estimated that around one in every 5,000 people with measles will die as a result of a serious complication.
Some people listen to "junk science" about the idea that measles can cause autism. This is just a plain fear tacit. And just who will pay for the care of those children whose parents will not vaccinate and who then come down with severe (and deadly) side effects.