Can West Nile Virus Be Fatal
Yes, West Nile virus can be fatal in severe cases. Most infections are mild, but a small percentage develop neuroinvasive disease, which can lead to death. Serious outcomes are more common in older adults and people with weakened immune systems.
Who Is at Highest Risk
People over 60 and those with conditions like cancer, diabetes, or kidney disease face higher risk of severe illness. Organ transplant recipients and individuals with suppressed immune systems are also more vulnerable. Early medical care can reduce the chance of complications.
When to Seek Immediate Help
Seek emergency care if you have high fever, severe headache, stiff neck, confusion, sudden weakness, or seizures. These may signal encephalitis or meningitis. If symptoms appear after a possible mosquito bite, contact a healthcare provider promptly. For more information, visit the CDC West Nile page.
