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
Yellow fever is a viral infection transmitted by a bite from infected mosquitoes most commonly found in parts of South America and Africa. When transmitted to humans, the yellow fever virus can damage the liver and other internal organs and be potentially fatal.
The World Health Organization estimates there are 200,000 cases of yellow fever worldwide each year, resulting in 30,000 deaths. Yellow fever appears to be on the rise internationally, due to a decreased immunity to infection among...
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