Severe West Nile Virus Cases Affecting Brain Reported to be Rising in U.S.
Severe cases of West Nile virus affecting the brain are reportedly rising in unspecified parts of the US.
Greensboro High Point Winston Salem, NC, November 6, 2026 — A concerning trend indicates a potential rise in severe cases of West Nile virus (WNV) that impact the brain across unspecified regions of the United States. Details regarding the exact locations experiencing this increase, specific timelines, or the scale of the reported rise have not been publicly disclosed in the available information.
West Nile virus is primarily transmitted to humans through the bite of an infected mosquito. While many WNV infections do not cause symptoms, a smaller percentage can lead to severe illness, including neuroinvasive disease. Neuroinvasive WNV affects the central nervous system and can manifest as encephalitis (inflammation of the brain) or meningitis (inflammation of the membranes surrounding the brain and spinal cord).
Symptoms of severe WNV disease can include high fever, headache, stiff neck, disorientation, tremors, convulsions, paralysis, and coma. These severe manifestations, particularly those affecting the brain, can lead to long-term neurological damage or be fatal. The Centers for Disease Control and Prevention (CDC) and local health departments monitor WNV activity throughout the mosquito season, typically from summer through fall.
Information about the specific factors contributing to the reported rise in severe, brain-affecting cases is currently unavailable. Health officials typically advise the public on preventive measures such as using insect repellent, wearing long sleeves and pants, and eliminating standing water around homes to reduce mosquito breeding grounds. Further details concerning the scope of this trend and any official public health advisements are pending.
Story summarized from the original created by Alison Young for Healthbeat on greensboro.com, see more information here.
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