West Nile Virus
West Nile virus (WNV) is a virus commonly found in Africa, West Asia, and the Middle East. It is carried by mosquitoes. West Nile can cause disease in humans, birds, horses, and some other mammals. The virus was found in the U.S. in 1999 and in Utah in August 2003.
The most common way to get infected is through the bite of a mosquito. Most people (70-80%) who become infected with West Nile virus do not develop any symptoms. Other symptoms include headache, body aches, joint pains, vomiting, diarrhea, or rash. Less than 1% of people infect will develop a serious neurologic illness, such as meningitis.
Information for the General Public
- Fact Sheet
- Information About Insect Repellent
- Protection against Mosquitoes, Ticks, & Other Insects & Arthropods
- Educational Resources
- West Nile Virus - Frequently Asked Questions
Information for Public Health Departments
Information for Pregnant and Breastfeeding Women
- West Nile Virus and Pregnancy Fact Sheet (English) (Spanish)
- Use of DEET in Pregnancy (English) (Spanish)