How booster shot back-and-forth may hurt U.S. vaccinations

An advisory panel for the Centers for Disease Control and Prevention on Thursday recommended the Pfizer booster shots for people 65 and older, nursing home residents, and younger adults with underlying health issues. For a deeper look at that decision, Amna Nawaz is joined by Kirsten Bibbins-Domingo. She is a physician, epidemiologist and professor at the University of California, San Francisco.