The World Health Organization Regional Office for Europe is urging countries to strengthen mosquito surveillance and public knowledge of protective measures as West Nile virus cases climb in parts of the continent,

The World Health Organization raises the alarm over the increase in cases of West Nile virus in Europe, with particular attention to the growth of infections in Italy and Greece. The WHO calls for strengthening surveillance and prevention measures against mosquito bites.

West Nile virus is the leading cause of mosquito-borne illness in the continental United States. As of Sept. 23, over 1,100 human cases of West Nile disease have been reported across 42 states, according to the U.S. Centers for Disease Control and ...

HENRICO COUNTY, Va. — Health officials are warning Henrico County residents about an increased risk of West Nile virus after mosquito testing showed concerning results. About 50% of mosquito trap sites tested in the county over the past two weeks were ...

Higher temperatures helped a new strain of West Nile virus invade and spread across North America, according to a study published in the June 27 issue of the journal PLoS Pathogens. “The study shows that the warmer the temperature, the greater the ...

In California Culex mosquitoes are considered to be the principle vectors of West Nile virus (WNV), which infects birds, humans, and other mammals during the summer. In addition, these mosquitoes may also serve as overwintering reservoir hosts as the virus ...

Health departments in four states have confirmed the first human West Nile virus cases of the 2026 season, and at least one patient required hospitalization after developing severe neuroinvasive disease.