As the hottest weather of the year returns, so do mosquitoes—and with them, the potential risk of West Nile virus. West Nile virus is primarily spread through the bite of an infected mosquito and it’s the leading cause of mosquito-borne disease in the United States. Although some people infected with it don’t feel sick, the virus can cause serious and even life-threatening illness in some individuals. For that reason, prevention is key.

About one in five people infected with West Nile virus develop a fever with headache, body aches, joint pains, vomiting, diarrhea, or rash. In severe cases—especially among older adults, those with weakened immune systems, or chronic medical conditions—the virus can lead to serious neurological illnesses such as meningitis or encephalitis, which can result in long-term disability or death.

How to Prevent West Nile Virus

The good news is that you can take simple, effective steps to protect yourself and our community. When it comes to West Nile prevention, remember the 4 D’s.

DEET. Use an insect repellent or apply EPAregistered insect repellents that contain DEET, picaridin, IR3535, or oil of lemon eucalyptus.

Dress. Wear long-sleeved shirts, long pants, and socks to reduce skin exposure.

Dawn/Dusk. Mosquitoes are most active at dawn and dusk. Knowing that can help you prepare if you plan to be outdoors.

Drain. Mosquitoes lay eggs in standing water, and their larvae can develop in just a few days. Empty and scrub items like flower pots, bird baths, pet water bowls, buckets, and kiddie pools.

Stay informed about local mosquito control efforts or reported cases of West Nile virus in our area. The City of Loveland works closely with Larimer County Department of Health and Environment, VDCI Mosquito Management, and Colorado State University to monitor data and assess human risk. Residents can see a current, interactive map of Loveland mosquito data online at lovgov.org/MosquitoControl.