West Nile Virus Claims One Life in Chicago; Two Cases Confirmed
A person has died from West Nile virus in Chicago, and city health officials have confirmed two cases of the illness.
Chicago, IL, September 1, 2026 — A death has been attributed to West Nile virus (WNV) in Chicago, as confirmed by city health officials. This marks the first reported fatality from the illness in the city this season.
In addition to the fatality, Chicago Department of Public Health (CDPH) officials have also confirmed two other cases of West Nile virus infection. The identities of the deceased individual and the other individuals who contracted the virus were not immediately released.
West Nile virus is transmitted to humans primarily through the bite of an infected mosquito. While many people infected with WNV show no symptoms, some can develop serious neurological illness. Symptoms typically appear between 3 to 14 days after the mosquito bite and can include fever, headache, body aches, joint pains, vomiting, diarrhea, or rash. In rare cases, WNV can cause severe illness, such as encephalitis (inflammation of the brain) or meningitis (inflammation of the membrane surrounding the brain and spinal cord), which can be fatal.
Health officials are urging residents to take preventative measures to protect themselves from mosquito bites. These measures include using insect repellent containing DEET, picaridin, or oil of lemon eucalyptus when outdoors, wearing long sleeves and pants, and ensuring that windows and doors have screens to keep mosquitoes out of homes.
CDPH also advises residents to eliminate standing water around their homes, as mosquitoes breed in stagnant water. This includes emptying water from flower pots, pet bowls, birdbaths, and clogged gutters. Mosquitoes are most active at dawn and dusk, making these times particularly important for taking precautions.
The current number of reported WNV cases in Chicago stands at three, including one death. Further information regarding the progression of the WNV season and any additional cases will be provided by city health authorities as it becomes available. Residents are encouraged to stay informed through official city health channels.
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