HONG KONG, March 16, 2016 — The idea that type 2 diabetes is a disease that only afflicts affluent countries with high obesity rates is being challenged by its rapid spread in China and India. Venkat Narayan, director of Emory Global Diabetes Research Center, explains possible historical, evolutionary, and scientific reasons why Asians — especially Chinese and Indians — have become more susceptible to the disease. (53 min., 49 sec.)