The Latest Breaking News from West Nile

Westchester Confirms Its First West Nile Case of the Year in Yonkers as Metro Detections Climb

A Yonkers resident is Westchester County's first human West Nile case this year. Officials are still tracing where the exposure happened.

Medical Daily · Sep 3

A Standard West Nile Blood Test Can Come Back Negative in Patients Taking Common Infusion Drugs

CDC guidance warns that antibody testing can miss arboviral infection in patients on B-cell drugs, as West Nile season enters its peak weeks.

Medical Daily · Sep 3

One Positive Mosquito Trap Has Arlington Spraying Two Nights as North Texas Enters Peak West Nile Season

Arlington sprayed for West Nile over two September nights after one trap tested positive. Here is what triggers spraying and what residents should do.

Medical Daily · Sep 2

Idaho Confirms Its First West Nile Meningitis Case of the Season in a Canyon County Resident Over 65

Idaho confirmed its first West Nile virus meningitis case of the year in a Canyon County resident. Here are the neurological warning signs.

Medical Daily · Aug 19

Two Cases Were Enough for South Carolina to Declare a West Nile Outbreak While Arizona Reports 73 This Year

South Carolina declared a West Nile virus outbreak in its Pee Dee region after two cases were reported, as national totals for the year reached 181.

Medical Daily · Aug 13

West Nile Cases Climb to 143 Nationally as CDC Data Show the Season Entering Its Peak Weeks

CDC surveillance reports 143 West Nile cases nationally through Aug. 4, up from 113 a week earlier, as peak transmission weeks begin.

Medical Daily · Aug 10

Where have all the mosquitoes gone? Parts of the US are seeing a huge drop — and that has experts worried

Mosquito levels are down 50 percent across some western and Midwest states - but the West Nile virus caseload has hit a 22-year high

The Independent UK · Aug 9

North Dakota Confirms First Human West Nile Case as Five Counties Report Positive Mosquitoes

A Cass County resident was hospitalized with West Nile virus, North Dakota's first human case of 2026, with positive mosquitoes in five counties.

Medical Daily · Aug 8

CDC Reports West Nile Caused Most U.S. Arboviral Disease in 2024 as Powassan Reached a Record High

A CDC surveillance report counted 1,955 arboviral cases in 2024. West Nile dominated, and tick-borne Powassan hit a record 60 cases.

Medical Daily · Aug 5

California Reports Its First West Nile Death of 2026 in Kings County as Statewide Surveillance Numbers Climb

Kings County confirmed California's first West Nile death of 2026. Statewide mosquito surveillance shows why human case counts understate the spread.

Medical Daily · Aug 4