AP

Four people in the Boston-area have been diagnosed with chikungunya, a viral disease transmitted to people by mosquitoes, an official with the Boston Public Health Commission confirmed to WCVB-TV.

According to the Boston Public Health Commission official, the cases do not pose a threat to the public.

The most common symptoms of chikungunya virus infection—which last about three to seven days—are fever and joint pain. Other symptoms may include headache, muscle pain, joint swelling, or rash, according to the US Centers Disease Control and Prevention. There is no vaccine to prevent or medicine to treat the infection.

Advertisement - Continue Reading Below

There have been more than 50 cases of chikungunya in the US since July 1, 2014. A majority of the cases have been detected in Florida by travelers returning from the Caribbean.

According to health officials, no mosquitoes in the continental US have been found carrying the disease.