Matthew Herper(@matthewherper):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 I want to tell you what happened when an MMR vaccine was withdrawn for safety reasons in Japan.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.

2026.08.11 14:42

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 I want to tell you what happened when an MMR vaccine was withdrawn for safety reasons in Japan.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.