Atul Gawande on U.S. vaccine hesitancy and herd immunity

Nearly one in five American adults is hesitant to get a COVID-19 vaccine, which could make it harder for the country to reach herd immunity. Meanwhile, the virus continues to mutate, with the CDC announcing today that the British variant is dominant in the U.S. Dan talks with Dr. Atul Gawande, author and advisor to the Biden administration, about what vaccine hesitancy means for the U.S. and the world.