New Jersey Reports First West Nile Death of 2026 as state health officials warn residents that mosquito-borne disease risk remains active well into fall. The New Jersey Department of Health says 26 human West Nile virus cases have been reported so far this year, including the state’s first confirmed death. Nineteen of those patients developed neurological illness, and 69 percent of all reported cases have occurred in people age 60 or older. State officials are urging residents not to assume mosquito season is finished simply because temperatures are beginning to cool.
New Jersey Has Reported 26 Human Cases
The New Jersey Department of Health announced the state’s first West Nile virus death on October 2. The person lived in southern New Jersey and was over age 60. Of the 26 confirmed human cases reported statewide, 19 involved neurological disease, including meningitis or encephalitis. Fourteen patients became ill during the final week of August or during September, and officials say additional cases remain under investigation. Monmouth County has reported the most cases with six, followed by Mercer County with four and Camden County with three.
Mosquito Activity Is High Across the Entire State
The human cases are only one part of the picture. New Jersey’s mosquito surveillance program has detected West Nile virus in 1,182 mosquito pools this year, with positive samples reported in all 21 counties. State officials say detections in recent weeks have been higher than historical averages. That means West Nile activity is not limited to one city or region. Mosquito surveillance can reveal virus activity before human cases are identified, helping local mosquito-control programs decide where additional trapping, testing or treatment may be needed.
Older Adults Face the Greatest Risk
Most people infected with West Nile virus never develop symptoms. Those who do may experience fever, chills, headache, body aches, joint pain or fatigue. In a smaller number of infections, the virus can affect the brain and nervous system and cause meningitis, encephalitis or other serious neurological illness. New Jersey’s current numbers show how heavily severe cases are concentrated among older adults. Nearly seven in ten reported cases this year have occurred in people age 60 or older. State health officials also warn that people with weakened immune systems face a greater risk of severe disease.
Why Reported Cases Are Only Part of the Story
Official West Nile case counts do not represent every infection occurring in the community. Many infected people never know they have the virus because they develop no symptoms or only mild illness and are never tested. The 26 cases reported in New Jersey therefore represent confirmed infections that came to the attention of the healthcare and public-health systems, not the total number of people exposed to infected mosquitoes. This is one reason mosquito testing remains an important part of West Nile surveillance.
Mosquito Season Is Not Necessarily Over
The New Jersey vector-borne surveillance program continues tracking mosquito and human disease activity throughout the season. Although cooler temperatures eventually reduce mosquito populations, warm periods in early fall can allow mosquitoes to remain active. Residents should continue checking yards for standing water in buckets, flowerpots, birdbaths, toys, clogged gutters and other containers that can support mosquito larvae.
What Residents Can Do Now
New Jersey officials recommend using EPA-registered insect repellent, wearing long sleeves and pants when practical and keeping window and door screens in good condition. Standing water around homes should be emptied regularly because many mosquitoes can complete their aquatic development in relatively small containers. PestMarket’s Mosquito Control Guide includes additional ways homeowners can identify breeding sites and reduce mosquito activity around their property.
West Nile Activity Can Continue Into Fall
This year’s first confirmed death underscores why residents should continue paying attention to mosquito precautions even after summer ends. New Jersey has already detected West Nile virus in mosquito samples from every county, and several human cases developed symptoms during September. The number of confirmed infections may also continue to rise because public-health investigations and laboratory confirmation can take time. For residents, the practical message remains straightforward: reduce standing water, protect against mosquito bites and do not assume cooler weather has completely ended the risk.