A now-infamous tweet by rapper Nicki Minaj is the latest example of false messaging about the COVID-19 vaccines.It's reignited a conversation about how to fight vaccine misinformation online — and whether calling it out actually works.And it's not just those outside the medical establishment who are hesitant or actively spreading false information. A small percentage of doctors are, too.We talk with experts about the tangled web of vaccine misinformation online — and how to fight it.Want to support 1A? Give to your local public radio station and subscribe to this podcast. Have questions? Find us on Twitter @1A.