In 2024, Orange County has already identified 25 cases of dengue virus infection. This exceeds the number of county residents identified with dengue virus infection in any year over the last 10 years. All of these cases have been among international travelers and no locally acquired dengue virus infections have been identified in Orange County to date.
In June, the CDC released a Health Alert: Increased Risk of Dengue Virus Infections in the United States. While cases of dengue virus infection in the Americas have declined over the last several weeks based on data from the Pan American Health Organization (PAHO), counts remain above the 5 year average. Dengue also remains endemic in many parts of Asia and Africa.
The Aedes aegypti mosquito is the primary vector for dengue virus. Aedes aegypti are widespread in Orange County. Their presence, along with increasing numbers of travel-associated dengue virus infection, increase the risk for local transmission of dengue. More info...
