Man whose blood helped develop measles vaccine weighs in on recent outbreak

A second child died from measles-related causes in Texas where an outbreak has infected at least 505. 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. Deema Zein spoke with someone who had a front-row seat to its creation. PBS News is supported by - https://www.pbs.org/newshour/about/funders