Drug overdose deaths in the U.S. plunged last year to their lowest level since 2019, according to the CDC. In 2024, nationwide overdose deaths fell by nearly 30,000 from the year before, a drop of about 27 percent. There were declines across all categories of drug use, including opioids, the source of most overdose deaths over the past decade. John Yang discussed more with Brian Mann of NPR.