No surprise here. A study has confirmed it's very rare for vaccines to have serious side effects. There's no evidence vaccinations cause autism.

Dr. Charles Ericsson is the head of clinical infectious diseases at Houston's UT-Health Medical School.

"There is this group of people that somehow feels that they just don't see the benefit and they're concentrated on risks. They seem to simply be setting aside the downside of not vaccinating your child."

Dr. Ericsson says there are risks with just about everything, but the biggest risk a parent can take is to not vaccinate a child.

"There's no free lunch. All medicines, all vaccines have potential downsides; but they have measurable upsides as well."

A now discredited 1998 study started the myth vaccines were dangerous.