A:
Beginning in 2014, chikungunya virus disease cases were reported among U.S. travelers returning from affected areas in the Americas and local transmission was identified in Florida, Puerto Rico, and the U.S. Virgin Islands.
The U.S. mainland does have Aedes species mosquitoes that can become infected with and spread chikungunya virus. U.S. travelers who visit a country where chikungunya is found could become infected if bitten by a mosquito.