Most people infected with
West Nile virus do not have symptoms. Others have mild
symptoms. In rare cases, infection can lead to inflammation of the brain (encephalitis), the spinal cord (myelitis), or the
tissues surrounding the brain and the spinal cord (meningitis).
The time from infection to the appearance of symptoms (incubation period)
usually is 3 to 14 days. Symptoms of the mild form of West Nile virus
Myositis refers to any condition causing inflammation in muscles. Weakness, swelling, and pain are the most common myositis symptoms. Myositis causes include infection, injury, autoimmune conditions, and drug side effects. Treatment of myositis varies according to the cause.
If you or a person in your care has symptoms like these,
contact your doctor immediately.
You may have tremors, muscle
aches, and fatigue for months after the illness, especially if your brain
became infected. Other possible effects include seizures, memory loss,
personality changes, paralysis, and symptoms similar to
Parkinson's disease. Some of these problems may last a