
You know E. Coli as the illness you can get from unpasteurized milk or contaminated romaine lettuce. But only a few strains of the bacteria make you sick. Most are harmless or helpful members of your body’s lively internal ecosystem, the microbiome.

You know E. Coli as the illness you can get from unpasteurized milk or contaminated romaine lettuce. But only a few strains of the bacteria make you sick. Most are harmless or helpful members of your body’s lively internal ecosystem, the microbiome.