When French epidemiologist Renaud Piarroux came back from a 3-week mission to Haiti in late November, he faced a dilemma. Piarroux, who had been invited by the Haitian government to investigate the country's explosive cholera outbreak, was convinced that the bacterium had been introduced by Nepalese soldiers taking part in the United Nations Stabilization Mission in Haiti (MINUSTAH)-and he wanted to present his evidence. At the same time, he was leery of exacerbating tensions in Haiti, where angry mobs had already demanded the departure of the Nepalese. Even after his confidential report for the Haitian government was leaked to the press, Piarroux didn't talk to reporters until he got permission from French authorities. "I was very concerned," he says.
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