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A new study examining the associations between mosquito species and the germs they carry finds just 9.3 percent of species transmit human disease-causing pathogens—but those associations are strong and likely resilient to the removal of individual species from the vector network. Within that network, the southern house mosquito (Culex quinquefasciatus) was the “most connected” species, capable of transmitting many pathogens that may also be transmitted by many other mosquitos in the network. (Photo by Jim Gathany, CDC Public Health Image Library)

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