Map Shows Mosquito-Borne West Nile Virus Spreading Across US, Killing Eight
Summary
West Nile virus cases have been reported in 32 U.S. states this year, with 222 human infections recorded by August 18, including 156 severe cases affecting the brain and nervous system. At least eight people have died, mostly in Arizona and California, as the virus spreads through mosquitoes during the summer and early fall.Key Facts
- The CDC reported 222 human cases of West Nile virus in 32 states as of August 18, 2024.
- There have been 156 neuroinvasive cases, the most serious form affecting the brain and nervous system.
- At least eight deaths have occurred: five in Arizona and three in California.
- Arizona has the highest number of cases this year (76), followed by Texas (31) and California (29).
- The virus spreads through mosquitoes and also infects birds and animals.
- Most infected people (about 80%) do not show symptoms; around 20% get mild illness (West Nile fever).
- Severe symptoms can include high fever, neck stiffness, confusion, muscle weakness, and vision loss.
- There is no vaccine or specific treatment; prevention includes using insect repellent, wearing protective clothing, and removing standing water where mosquitoes breed.
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