West Nile Deaths Rise to 5 as U.S. Mosquito Season Intensifies

Five Americans have died from West Nile virus this year, with two fresh fatalities reported in New Jersey pushing the count higher as summer fades into fall. The deaths mark a grim milestone in what has become an increasingly familiar seasonal threat: across thirty-three states, health officials have documented two hundred eighty-nine confirmed cases of the mosquito-borne illness in 2024 alone.

The two New Jersey deaths arrived as state health officials confirmed them on Friday. But New Jersey was not alone in reporting losses. Eastern Wisconsin had already claimed two lives from the virus, and northeastern Illinois recorded its first death of the year—a resident of Lake County who showed symptoms in mid-August and died shortly after. A third person in Wisconsin lay hospitalized with the infection. The Wisconsin cases clustered in three counties: Outagamie, Fond du Lac, and Brown. In Lake County, Illinois, three people tested positive within a single seven-day window, according to the Lake County Health Department and Community Health Center.

The virus spreads through the bite of an infected mosquito, and the season that carries it stretches from summer through fall—a window that appears to be widening. The Centers for Disease Control and Prevention tracks the progression closely. Most people bitten by an infected mosquito never develop symptoms at all. But roughly one in five will experience fever, headache, body aches, vomiting, diarrhea, or a rash. The truly dangerous cases are rare but real: about one in every one hundred fifty infected people develops a serious illness, sometimes fatal. There is no vaccine to prevent West Nile virus and no medicine to treat it once infection takes hold.

Older adults and people with weakened immune systems face the highest risk. Dr. Sameer Vohra, director of the Illinois Department of Public Health, framed the deaths as a stark reminder of that vulnerability. "This death—and the six that occurred last year in Illinois—are a reminder that West Nile virus poses a serious risk, especially to older people and those with weakened immune systems," he said in a statement. The comparison to last year's toll underscores a pattern: West Nile is not new to America. It arrived in 1999 in New York and has spent a quarter-century spreading gradually across the country.

Wisconsin typically records an average of eighteen cases per year. This year, the virus has turned up not only in human patients but in mosquitoes, animals, and even in the blood of healthy donors whose donations screened positive during routine testing. The detection in blood supplies adds another layer of concern to public health officials already tracking the outbreak.

The illness gained recent public attention when Dr. Anthony Fauci, the former director of the National Institute of Allergy and Infectious Diseases who led the federal coronavirus response, announced his own infection. Fauci told CBS News he likely contracted the virus from a mosquito bite in his own backyard. He was hospitalized after developing fever, chills, and severe fatigue. His case, though not fatal, illustrated that West Nile does not discriminate by status or expertise.

As the mosquito season continues its arc through the fall months, the five deaths already recorded this year stand as a measure of what remains possible. The virus is circulating. The mosquitoes are still biting. And for those most vulnerable, the risk persists until the first hard frost arrives.