Photo Gallery: A Human Tragedy 11/24/2010
 Epidemiologists do not completely dismiss the theory. But they warn that it...
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Epidemiologists do not completely dismiss the theory. But they warn that it may be impossible to know how the epidemic started. Many Haitians have lived in tent cities since the earthquake, and disease has flourished under the rain and sun. More than 1,400 Haitians have died of cholera since October.