Pediatric medicine changed many years ago with the advent of vaccines for many of the bacterial diseases which plagued children. The numbers of sick children decreased as did the severity of infections for those who became ill. The media doesn't write headline articles about these medical statistics. Something did happen over the past several decades and it made our children healthier. That something is the wide spread use of vaccines for many of the severe diseases of childhood.
This educational website offers articles on pros and cons about vaccines: