Surging dengue cases in Americas cause alarm as potentially worst-ever season looms Dengue cases in the Americas rose in the first three months of this year by three times the number of infections reported in the same period last year, the head of the Pan American Health Organization said on Thursday. Marion Giraldo Reuters

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Brazil, Argentina and Paraguay are the countries hardest hit by dengue in what PAHO officials described as potentially the worst outbreak in the Americas to date for the deadly mosquito-borne viral illness.

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