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Vicious stomach bug spreads across US

Dr. Marc Siegel discusses the spread of the Cyclosporiasis stomach bug, the World Health Organization's report on increasing cancer rates by 2050, and research on 'super mover' adults who reduce cognitive decline through fast walking.

Ó£ÌÒÊÓƵ senior medical analyst Dr. Marc Siegel joins Bill Hemmer to discuss a major Cyclosporiasis stomach bug outbreak in Michigan and Ohio, with over 1,200 cases. Dr. Siegel also explains the World Health Organization's projection of soaring cancer rates by 2050 and the benefits of physical activity, specifically fast walking, for 'super mover' adults to reduce cognitive decline.