When parents refuse to vaccinate their children, more than one-third of all US pediatricians dismiss the entire family from their practices.<br />Furthermore, a new study of 300 pediatricians across the US reports 34% won't take on new patients whose parents are unwilling to allow the MMR vaccine.<br />UPI reports nearly half of all US children aren't vaccinated against diseases such as hepatitis B, pertussis, tetanus, and measles before they reach age 2.<br />Up to 10% of parents report delaying or refusing the shots.<br />However, 18% of pediatricians surveyed said parents often change their minds about vaccinating their children if they are threatened with dismissal.<br />Last year, the World Health Organization declared vaccine hesitancy one of the top 10 threats to global health.