The Latest Breaking News from West Nile Virus

Phoenix Leads the Nation in West Nile Virus Deaths as 2026 Season Becomes Worst in Over Two Decades

Maricopa County reports 29 West Nile cases and 4 deaths — the worst early-season start in over 20 years. CDC confirms 48 cases in 23 states. What Phoenix residents need to know now.

Medical Daily · Jul 17

West Nile Season Opens at a 22-Year High with 38 of 48 Cases Already Involving Brain Disease

CDC confirms 48 West Nile cases by June 30, 2026 — 38 involving brain disease. The earliest severe start in 22 years, with peak season still ahead. What to know now.

Medical Daily · Jul 16

Wisconsin Reports Its First West Nile Virus Activity as 23 States Enter a Record Early Season

Wisconsin confirmed its first West Nile detections July 14 as 23 states report the worst early-season activity since 2004. Here's who is most at risk.

Medical Daily · Jul 15

Four People Are Dead from West Nile Virus in Maricopa County: Here Is What Phoenix Residents Need to Do Tonight

4 people dead, 29 cases confirmed in Maricopa County — the worst early West Nile start in 20+ years. Phoenix residents should apply DEET repellent before tonight's outdoor events.

Medical Daily · Jul 4

West Nile cases hit highest total in decades as experts warn about mosquitos spreading the virus across the US

The US has seen the highest number of cases by this point in the year since 2004

The Independent UK · Jul 2

CDC Issues Fourth of July Warning as West Nile Virus Spreads to 23 States

CDC confirms 48 West Nile cases across 23 states — the worst early start in 20+ years. Here's what families need to know before July 4 celebrations.

Medical Daily · Jul 2

CDC urges people to prevent mosquito bites as West Nile virus season hits a strong, early start

West Nile virus season is off to its earliest and worst start since 2004

The Independent UK · Jul 1

West Nile Virus Detected Months Early in San Antonio and Dallas Metro as Mosquito Season Heats Up

West Nile virus has been detected months ahead of schedule in San Antonio and the Dallas metro area, with positive mosquito pools confirmed in New Orleans as well.

Medical Daily · Jun 10

What are the risks of contracting West Nile virus from a mosquito in Canada?

As a dead crow tested positive for West Nile virus in Ontario this week, Canadians may be wondering: just how prevalent are such mosquito-borne viruses in Canada, and how risky is the summer camping trip?

The Conversation · Jun 4

Google wants to release 64 million bacteria-riddled mosquitoes across California and Florida. Here's why scientists are enthusiastic.

Google has applied for an experimental mosquito release permit to deploy millions of non-biting southern house mosquitoes that it has infected with the bacterium Wolbachia pipientis, in an effort to reduce mosquito-borne diseases like West Nile virus.

LiveScience · Jun 3