Nurse on a mission to fight anti-vaccine myths as measles outbreak grows
01:52The CDC reported 555 confirmed measles cases in 20 states, a 20% increase in just a week. One nurse is on the front lines trying to convince parents to ignore the anti-vaccine myths on social media, which she once believed herself. **A previous version of this video included the use of a stock photo that had been altered, unbeknownst to NBC News. This photo has been replaced.**