Dengue cases may be 4 times more common than known

FILE- A mosquito (species unidentified) is held by tweezers in this file photo dated Wednesday, June 20, 2001, in Portland, Maine, USA. According to new research published online Sunday April 7, 2013, in the journal Nature, the number of infected cases around the world is around 390 million, about four times as many people infected with the tropical disease than was previously believed, although many develop a mild form of the illness and don’t need medical attention. (AP Photo/Robert F. Bukaty, FILE)LONDON (AP) — There may be nearly four times as many people infected with the tropical disease dengue globally than was previously believed, according to a new study.


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