First Local U.S. Case of Chikungunya in 6 Years Detected in New York State

Strategic Insights -

A resident of Long Island has tested positive for the chikungunya virus, marking the first locally acquired case in the United States since 2019. The infection was likely contracted from a mosquito bite, but authorities emphasize that the risk to the public remains extremely low due to decreasing mosquito activity with cooler temperatures. Chikungunya is a mosquito-borne virus that causes fever, rash, joint swelling, and muscle pain, with higher risks for newborns, older adults, and individuals with chronic health conditions.

Key Takeaways:

  • The first local U.S. case of chikungunya since 2019 has been detected in a Long Island resident who contracted the virus from a mosquito bite.
  • The infection was likely acquired from a mosquito bite while the person was in their home region, not from international travel.
  • There is no evidence of ongoing transmission, and the risk to the public remains "very low" due to decreased mosquito activity with cooler temperatures.
  • Chikungunya is a mosquito-borne virus that can cause fever, rash, joint swelling, and muscle pain, with higher risks for certain populations such as newborns, older adults, and individuals with chronic health conditions.
  • The virus is not spread from person to person and can only be transmitted through the bite of an infected mosquito.
  • New York state has recorded three other cases of chikungunya this year, all linked to international travel.

Statistics:

  • The first local U.S. case of chikungunya in 6 years has been detected in New York state.
  • The infection was contracted from a mosquito bite, with no evidence of ongoing transmission.
  • The risk to the public remains "very low" due to decreasing mosquito activity with cooler temperatures.
  • Chikungunya can cause fever, rash, joint swelling, and muscle pain in infected individuals.
  • 3 other cases of chikungunya have been recorded in New York state this year, all linked to international travel.

Sources:

  • The Associated Press, Oct. 15, 2025