The outbreak of a mosquito-borne illness in the Caribbean has doctors and experts bracing for an uptick in cases on North American soil.

(AP Photo/USDA, File)

Dozens of infections have already popped up in 2014, in many states, but all are cases that involve people who traveled from outside the country. The Caribbean had not had its first local transmission until late last year, according to the Centers for Disease Control and Prevention. Tens of thousands of cases have popped up since.

There is no treatment or cure for chikungunya virus, but death is extremely rare.

The most common symptoms of the virus include fever and severe joint pain.

The New Jersey Office of Mosquito Control Coordination, part of the state Department of Environmental Protection, indicated local transmission is not a threat for now, due to the strain that's involved.

More than 30 cases have been reported in the United States as of June 10, the CDC said, but zero in New Jersey.