> Why is vaccine safety such an important issue to him that he's bringing it up during a presidential candidate town hall? I didn't catch this particular part

> Why is vaccine safety such an important issue to him that he's bringing it up during a presidential candidate town hall? I didn't catch this particular part of the live broadcast, but if it's anything like the rest of it, either the moderator or the audience asked him about it. It seems like everyone associates him with vaccines, so it's a question that would obviously come up in the context of "how are you not a kook", and so he has to talk about it. I've seen him say explicitly in another interview that he's not running on vaccines, but if people ask him about it he'll respond.