“When vaccination programs are successful to the point where the disease is unfamiliar to physicians and public alike, then concerns can arise with real or perceived side effects of a vaccine that affect a very small minority of those vaccinated. Such concerns lead to fewer children being vaccinated and to increasing occurrence of the disease.” VaccinesVaccineVaccinationVaccine Autism ConnectionVaccine ConspiracyVaccineinated Book:The Immune System, Fourth Edition Source: The Immune System, Fourth Edition