Dr. Leana Wen on Vaccine Mandates and How to Stop the Delta Variant

The highly contagious Delta variant is causing a rise in cases around the world, from the Olympics in Tokyo to Russia, Indonesia and the U.S. The Centers for Disease Control and Prevention has issued new guidelines suggesting that people resume wearing masks indoors, but state and local officials are not legally required to implement CDC guidelines.

Dr. Leana Wen, an emergency physician and former Baltimore health commissioner, says she supports the new CDC guidelines because an "honor system" of trusting people to wear masks unless they were vaccinated clearly did not work. "We know that we can’t trust the unvaccinated," she says. She also discusses global vaccine inequity, how to overcome vaccine hesitancy, and her new memoir, "Lifelines: A Doctor’s Journey in the Fight for Public Health."