GLOBAL CONTAGIONS ALWAYS start off small, and like most small things, they're easy to miss. The patient in Hamburg who went to the hospital on May 18 complaining of diarrhea, cramps and vomiting and was first suspected of having an inflammatory bowel condition would likely have gone unnoticed. But when four more patients in the same city became ill over the next two days with similar symptoms, German health officials started to pay attention.
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