A second child died from measles-related causes in Texas where an outbreak has infected at least 500 people. Until this year, the U.S. had no reported measles deaths in a decade. HHS Secretary Robert F. Kennedy Jr., a former anti-vaccine advocate, now says the MMR vaccine is the most effective way to prevent the spread of measles.
 
PBS News' Deema Zein spoke with David Edmonston, whose blood test at 11 years old led to the creation of the world’s first measles vaccine. Edmonston hopes speaking out will humanize the measles vaccine today, even though he was skeptical of vaccines at times in the past.