Virginia reports first locally transmitted dengue fever case

In Virginia, a resident living in the suburbs of Washington DC has been diagnosed with dengue fever, marking the first locally transmitted case in the state. The patient was infected by a local mosquito that had bitten an infected traveler. Health officials report no evidence of further transmission, and the risk of contracting the virus in Virginia is considered low.

Virginia reports first locally transmitted dengue fever case
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science Published Aug 5, 2026

Topic overview

In brief

  • A resident in Virginia has been diagnosed with dengue fever, the first locally transmitted case in the state.
  • Health officials believe the virus was spread by a local mosquito that bit an infected traveler.
  • Currently, there is no evidence of ongoing transmission in Virginia, and the risk remains low.

Summary

In Virginia, a resident living in the suburbs of Washington DC has been diagnosed with dengue fever, marking the first-ever case of locally transmitted dengue in the state. The patient, who resides in Fairfax and Loudoun counties, is believed to have contracted the virus from a local mosquito that bit an infected traveler. Dengue fever is a serious illness that can lead to severe internal bleeding and intense pain, often described by patients as feeling like their bones are breaking. Health officials have stated that there is currently no evidence of ongoing transmission of the virus in Virginia, and no additional locally acquired cases have been reported. The risk of contracting dengue fever in the state remains low, according to health authorities. This case comes shortly after Florida recorded its first locally acquired dengue fever case of the year. Since 2010, Virginia has become the ninth state in the US to report local transmission of dengue fever, with the CDC noting that over 600 cases have been documented across the country during this period. Florida has the highest number of cases, followed by Hawaii, Texas, and California. Symptoms of dengue fever typically appear five to seven days after a mosquito bite and include fever, severe headaches, pain behind the eyes, muscle and joint aches, nausea, vomiting, and rashes. Health officials are advising travelers to take precautions, especially in areas where dengue fever is prevalent, and to be particularly cautious if they belong to high-risk groups such as children under five, adults over 65, and pregnant women. The emergence of this case in Virginia highlights the ongoing risk of mosquito-borne diseases in the United States, particularly as climate conditions may facilitate the spread of such viruses.

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Updated Aug 5, 2026

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