Matthew Herper
Yes, Trump's push to split up the MMR vaccine could do real harm. So I want to tell you some things. I want to tell you what happened when an MMR vaccine was withdrawn for safety reasons in Japan. I want to tell you what scientists say will happen if measles vaccination rates drop. But mostly I want to tell you about a father making a mumps vaccine we still use today from virus taken from his daughter's throat. I want to tell you about Maurice Hilleman. Here's the piece. https://www.statnews.com/2026/08/11/how-we-know-splitting-up-mmr-vaccine-could-be-dangerous/