BCN-20220517-WESTNILE-03

Source caption: A Culex tarsalis mosquito resting on human skin shows the dark-scaled proboscis with a broad median white band on Tuesday, Sept. 20, 2005. The mosquito can spread Western equine encephalitis (WEE), St. Louis encephalitis (SLE), and California encephalitis, and is currently the main vector of West Nile virus in the western United States. (James Gathany/Centers for Disease Control via Bay City News)

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