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TOPSHOT - An Aedes Aegypti mosquito is photographed on human skin in a lab of the International Training and Medical Research Training Center (CIDEIM) on January 25, 2016, in Cali, Colombia. CIDEIM scientists are studying the genetics and biology of Aedes Aegypti mosquito which transmits the Zika, Chikungunya, Dengue and Yellow Fever viruses, to control their reproduction and resistance to insecticides. The Zika virus, a mosquito-borne disease suspected of causing serious birth defects, is expected to spread to all countries in the Americas except Canada and Chile, the World Health Organization said. AFP PHOTO/LUIS ROBAYO / AFP / LUIS ROBAYO (Photo credit should read LUIS ROBAYO/AFP/Getty Images)

TOPSHOT - An Aedes Aegypti mosquito is photographed on human skin in a lab of the International Training and Medical Research Training Center (CIDEIM) on January 25, 2016, in Cali, Colombia. CIDEIM scientists are studying the genetics and biology of Aedes Aegypti mosquito which transmits the Zika, Chikungunya, Dengue and Yellow Fever viruses, to control their reproduction and resistance to insecticides. The Zika virus, a mosquito-borne disease suspected of causing serious birth defects, is expected to spread to all countries in the Americas except Canada and Chile, the World Health Organization said. AFP PHOTO/LUIS ROBAYO / AFP / LUIS ROBAYO (Photo credit should read LUIS ROBAYO/AFP/Getty Images)
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AFP LUIS ROBAYO