What is the West Nile Virus?
It's one of a group of viruses spread by mosquito bites.

West Nile Virus (WNV) is a flavivirus commonly found in Africa, West Africa, and the Middle East. It is closely related to St. Louis Encephalitis virus found in the United States. WNV was first discovered in the United States in 1999. The virus can infect humans, birds, mosquitoes, horses, and some other mammals.

West Nile Virus can cause mild to severe illness. Most people who get infected do not get sick. Some get a mild, flu-like illness. In rarer cases, the virus can affect the brain and spinal cord, cause encephalitis, and can be fatal.

Spraying informed is the best way to defend against WNV. Learning about the virus and ways to prevent infection is key. Steps you take can help protect you from other mosquito-borne diseases, too.

Show All Answers

1. What is the West Nile Virus?
2. How does the West Nile Virus spread?
3. Is the West Nile Virus contagious?
4. How soon do you get the symptoms once you have been bitten?
5. What are the symptoms of West Nile Virus?
6. How is West Nile Virus treated?
7. Does the Health Department offer free testing?
8. Can I get the virus twice?
9. My child or I was bitten by a mosquito, what should I do?
10. What should I do if I think I have WNV?
11. What is Dallas County doing?
12. What can I do?
13. What should I do if I see dead birds in my yard?
14. Can dogs, cats, and other pets get West Nile Virus?
15. Are pesticides harmful to people?
16. Where can I learn more information?