Map shows West Nile virus cases as officials warn season isn’t over

The United States is currently facing a concerning rise in West Nile virus cases, with at least 771 human cases reported across 39 states as of September 9th. Of these cases, 490 are classified as neuroinvasive, indicating severe symptoms that impact the brain. West Nile virus, a mosquito-borne disease, is the leading cause of such illnesses in the continental U.S. The lengthening of mosquito season due to a warming climate has increased the potential for disease spread, making it crucial for the public to remain vigilant.

Massachusetts recently reported two additional human cases, prompting state health officials to emphasize the importance of continued precautions. Dr. Robbie Goldstein, the state’s public health commissioner, highlighted the need for ongoing protection measures until the first hard frost of the season, which is still several weeks away. These measures include using mosquito repellent, wearing long sleeves and pants to minimize exposed skin, and eliminating any standing water sources around homes.

The CBS News data team is actively monitoring confirmed West Nile cases nationwide through the ArboNET system managed by the Centers for Disease Control and Prevention and state health departments. The interactive map below provides updated information on reported cases of West Nile virus throughout the year.

Symptoms of a West Nile virus infection typically resemble those of the flu, including nausea, aches and pains, vomiting, fever, chills, and occasionally a rash. Severe cases, affecting less than 1 in 150 individuals, can lead to inflammation of the brain and spinal cord lining. While most infected individuals do not display symptoms, those who do typically experience them within 2-6 days of being bitten by an infected mosquito.

Since there is no specific treatment available for West Nile virus, prevention is key. Health experts stress the importance of taking preventive measures, especially for high-risk groups such as the elderly and immunocompromised individuals. By following the recommended precautions to reduce the risk of mosquito bites, individuals can protect themselves from potential infection.

As the West Nile virus continues to pose a threat, staying informed and proactive in mosquito bite prevention remains essential. By adopting these preventive measures and remaining aware of the current situation, individuals can help reduce the spread of this mosquito-borne disease and safeguard their health and well-being.