Well all a vaccine is, is a weakened form of a pre existing virus which is a attacked by the body and creates anti-bodies.
Lots of ignorance though, we got people who don't know geography worrying about overpopulation when they don't know that most of the overpopulation happens in places like Africa, India, and China.
The same time we got people convinced vaccines might cause autism because of one sketchy piece of research. I believe things like ADHD, ADD, and Autism have always been with us since humans came into existence. Probably the only reason why we are noticing it more and more is because of the population increase in people. We also have other potential factors like radiation from electronics, pollution, etc. Then we got people in Africa in believing that modern medicine is the work of the devil and things like ebola and measles are the work of evil spirits and white imperialists.
i would prefer it over the common flu.
Measles looks like a chick repellent.