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  • Chikungunya is a virus transmitted to people by Aedes mosquitoes.
  • There have been no locally acquired chikungunya in California, but cases have been reported in travelers to areas where chikungunya is circulating.
  • Travelers can protect themselves by preventing mosquito bites (See for tips).

Chikungunya is reportable in Orange County within one (1) working day of identification. To report a case, health care providers/facilities should call OCHCA Epidemiology at 714-834-8180 or fax records to 714-560-4050. In 2015, 24 cases of chikungunya were reported in Orange County (all in returning travelers), but in 2016 and 2017, two (2) cases were reported each year.

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