ROBERT SIEGEL, HOST:
Obesity has long been recognized as a public health problem. But this week, the American Medical Association, the nation's largest professional organization of physicians, has taken the step of officially recognizing obesity as a disease.
NPR's Allison Aubrey joins us now to talk about what this means. Hi, Alison.
ALLISON AUBREY, BYLINE: Hi there, Robert.
SIEGEL: What's the significance of declaring obesity a disease?