What could Robert F. Kennedy, Jr.’s appointment as Secretary of Health and Human Services mean for the public health of everyday Americans, given his history of vaccine misinformation? With measles already on the rise and deadly, and the looming threat of future pandemics, how might his leadership shape the nation’s response to infectious diseases?

To find out, we spoke with Dr. Abdul El-Sayed—physician, epidemiologist, author, and county health commissioner. He is formerly the health director for the city of Detroit. As the host of the award-winning America Dissected podcast, he breaks down the forces shaping public health for tens of thousands of listeners each week. This is the first of two episodes with Dr. El-Sayed.