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Mosquito-borne Chikungunya virus claims more U.S. states

This map shows the geographic distribution of the Chikungunya virus in the U.S. and its territories as of July 22, 2014.
This map shows the geographic distribution of the Chikungunya virus in the U.S. and its territories as of July 22, 2014.
Photo: Centers for Disease Control (CDC)
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