Buzz
The West Nile virus has been detected in an unusually high number of mosquitoes in the New York City area, with at least two human cases confirmed. If you missed the major West Nile outbreak about two decades ago, you may be wondering what exactly this virus is and if it’s something to be alarmed about.
What exactly is the West Nile virus?
The West Nile virus is spread by mosquitoes and can infect birds, other animals such as horses, and humans. Most people who contract the virus won’t show symptoms. About 20% may experience fever and flu-like symptoms, but in rare instances—around 1 in 150 people, according to the CDC—the virus can lead to more severe neurological issues.
In more severe cases, the brain or its surrounding membranes can become inflamed. This may lead to symptoms like neck stiffness, confusion, weakness, seizures, numbness, vision loss, or even paralysis. About 1 in 10 individuals with severe West Nile illness may die from it.
Where is West Nile virus a problem?
The virus and its mosquito carriers are widespread across the continental United States. Historically, the highest number of cases are found in the western part of the country, particularly in areas stretching from North Dakota to Colorado.
Why is this becoming a concern now?
West Nile first gained attention in the early 2000s, but it never fully disappeared. According to the New York City Department of Health, warmer temperatures allow mosquitoes to reproduce faster, likely contributing to the increased spread of the virus. Additionally, wetter-than-usual conditions in the southwestern U.S. have created an environment that favors mosquito growth, which is bad news for us.
Although the New York cases are currently in the spotlight, they aren't the only instances of West Nile. California, for instance, has already reported 12 human cases this year.
What steps should I take?
As with any illness spread by mosquitoes, the best approach is to prevent bites. A reliable insect repellent containing DEET or another EPA-approved pesticide like picaridin is essential. Additionally, you can protect yourself by ensuring your windows are screened to keep mosquitoes out, wearing long sleeves and pants when possible, and using a fan to keep them at bay while enjoying time outdoors.
Mosquito control is another useful measure. Mosquitoes lay eggs in stagnant water, so if you have items like buckets, flowerpots, birdbaths, or other containers that collect water, it’s important to empty and clean them regularly or treat them with larvicide (which targets the mosquito larvae) if they can’t be discarded.
