NBC Nightly News with Lester Holt - Caroline Kennedy highly critical of cousin Robert F. Kennedy Jr.

Advocates Jen Fisher and Dr. Daniel McGinley are featured in this NBC Nightly News piece about decreasing vaccination rates.

Caroline Kennedy was critical of her cousin Robert F. Kennedy Jr.'s views on vaccinations on the eve of his confirmation hearings for Secretary of Health and Human Services. It comes as vaccination rates for some diseases have been decreasing. NBC News' Erin McLaughlin reports.