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SANTA CRUZ, BOLIVIA - FEBRUARY 04 : Detail of suspected larvae of "Aedes aegypti" under a microscope at National Center for Tropical Diseases (Senetrop) in Santa Cruz, Bolivia on February 4, 2016. (Photo by Marcelo Perez Del Carpio/Anadolu Agency/Getty Images)

SANTA CRUZ, BOLIVIA - FEBRUARY 04 :  Detail of suspected larvae of "Aedes aegypti" under a microscope at National Center for Tropical Diseases (Senetrop) in Santa Cruz, Bolivia on February 4, 2016. (Photo by Marcelo Perez Del Carpio/Anadolu Agency/Getty Images)