This episode is the final installment of "Q&A with Lisa Gray" and Lisa ends the podcast where it began: Talking with bow-tied vaccine researcher Peter Hotez.

Hotez co-directs the Texas Children’s Hospital Center for Vaccine Development and is dean of the National School of Tropical Medicine at Baylor College of Medicine. He’s also known for fighting anti-science disinformation on Twitter, cable news networks and elsewhere.

Lisa is leaving the Chronicle to take a job with a media startup in Houston.

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