Amherst Biologist Takes Evolutionary Tack in Struggle to Control Infectious Disease

Paul Ewald says we should be seeking to tame the microbes, not kill them off

Paul W. Ewald's interest in the evolution of infectious disease began with a personal affliction many people prefer not to talk about: diarrhea.

What Mr. Ewald, a professor of biology at Amherst College, found in medical reference books when he was trying to treat a case of diarrhea in the late 1980s has shaped the rest of his

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