BROADCASTS.com

For the past couple of weeks, some Americans have reported a curious phenomenon: They have caught the coronavirus despite being vaccinated.\n\nVaccines are still doing their job by protecting against serious illness and hospitalization, but the frequency of so-called breakthrough infections has surprised experts.\n\nHow do such cases happen, and what risks do they pose?\n\nGuest: Apoorva Mandavilli, a science and global health reporter for The New York Times.