These are insect cells infected with the Guaico Culex virus. The different colors denote cells infected with different pieces of the virus. Only the brown-colored cells are infectious, because they contain the complete virus. Michael Lindquist/Cell Press hide caption

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Surgeon General Vivek Murthy looks at a sample of mosquitoes in Orlando, Fla., on Monday. With him is Department of Health and Human Services Secretary Sylvia Burwell and Orange County Mayor Teresa Jacobs. John Raoux/AP hide caption

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By hanging a caged chicken near mosquito traps in bedrooms in three Ethiopian villages, researchers hoped to learn how the insects react to the scent of a fowl. Kassahun Jaleta/Courtesy of Rickard Ignell hide caption

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People walk past graffiti art in the Providencia community of Rio, a favela that dates back to 1897. Mario Tama/Getty Images hide caption

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Is The Risk Of Catching Zika Greater In Poor Neighborhoods?

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A common house mosquito (Culex pipiens) is about to sink her six-weaponed proboscis into a human arm. This type transmits West Nile virus by biting infected birds, then biting humans. Josh Cassidy/KQED hide caption

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Mosquitoes in traps are transported back to the county's laboratory for analysis. Carrie Feibel/Houston Public Media hide caption

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Mosquito Hunters Set Traps Across Houston, Search for Signs of Zika

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A scientist examines mosquitoes at the lab. Walter Reed Army Institute of Research hide caption

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Volunteers Who Say 'Bite Me' Are Helping To Win The War Vs. Mosquitoes

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Mosquito larvae fill the cup of stale water that entomologist Luis Hernandez dips from a stack of old tires in a suburb of San Juan, Puerto Rico. Greg Allen/NPR hide caption

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Puerto Rico Races To Stop Zika's Mosquitoes Before Rains Begin

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Matthew Twombly for NPR

This Mosquito Likes Us Too Much For Our Own Good

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