West Nile virus

The first human case of West Nile virus in Orange County this year has been confirmed in an Anaheim resident. The virus is transmitted by Culex mosquitoes, which contract it from infected birds, and health officials warn of an intense WNV season due to multiple positive mosquito detections.

North Carolina confirmed its first human case of West Nile virus in 2026 in Gaston County, with a positive blood donor identified in Mecklenburg County and the virus detected in mosquitoes across multiple counties. Health officials emphasize prevention measures like mosquito repellent and eliminating standing water, as the virus spreads through infected mosquito bites and poses higher risks for elderly and immunocompromised individuals.

North Carolina confirmed its first West Nile virus case in a Gaston County resident, with a blood donor in Mecklenburg County also testing positive. The virus was detected in mosquitoes across Cabarrus, Forsyth, and Mecklenburg counties, prompting public health advisories on prevention.

Orange County health officials reported the first confirmed human case of West Nile virus of the year in an Anaheim resident. They are urging residents to take precautions against mosquito bites as a possible intense season is anticipated.

A mosquito trap in Buda has tested positive for West Nile virus, according to the Hays County Development Services Mosquito Surveillance Program. The detection highlights ongoing surveillance efforts in the area.

The Florida Department of Health in Palm Beach County issued a mosquito-borne illness advisory following a confirmed locally-acquired dengue fever case. Health officials recommend eliminating standing water and using mosquito repellent to prevent spread, while monitoring for other illnesses like West Nile virus and chikungunya continues.

West Baton Rouge detected West Nile Virus in a mosquito sample, prompting increased mosquito control spraying. The virus detection has led to enhanced preventive measures in the area.

The Maryland Department of Health confirmed the first human case of West Nile virus this year, following positive tests in mosquitoes in Anne Arundel County. Health officials urge preventive measures like using EPA-registered insect repellent and eliminating standing water to reduce mosquito breeding.

Health officials in Miami-Dade County confirmed a locally acquired dengue case and are coordinating mosquito surveillance and prevention efforts. Dengue, a mosquito-borne illness causing flu-like symptoms, is not transmitted between people. Residents are urged to take precautions to avoid mosquito bites.

Orange County mosquito control officials warn residents to use mosquito repellent as the county may face its worst West Nile virus season on record.

Galveston County health officials reported the first West Nile virus case in 2026. The affected resident, who is hospitalized, had travel exposures outside the county during the incubation period.

A fourth mosquito trap in Hays County has tested positive for West Nile virus. The report confirms ongoing surveillance and detection efforts in the area.

New York City will spray pesticide in specific neighborhoods after mosquitoes carrying the West Nile virus were detected. The NYC Health Department plans to spray Northwestern Staten Island on Monday night and Northeastern Queens on Wednesday.

The U.S. public health system is under strain from multiple disease outbreaks, including measles and hantavirus, attributed to factors like vaccine resistance and funding cuts. Health and Human Services Secretary Robert F. Kennedy Jr.'s policies and vaccine misinformation are cited as exacerbating the crisis, while environmental changes and animal disease spread further complicate containment efforts.

A sample of mosquitoes collected in Larimer County tested positive for West Nile virus. The detection highlights the presence of the virus in the local mosquito population.

The US public health system faces challenges from a surge in infectious diseases like measles, hantavirus, and West Nile virus, linked to vaccine resistance and funding cuts. Health and Human Services Secretary Robert F. Kennedy Jr.'s policies, including reducing public health resources and spreading vaccine misinformation, have worsened the situation.

The US public health system faces challenges from a surge in infectious diseases like measles, hantavirus, and West Nile virus amid funding cuts and vaccine resistance. Public health experts attribute the rise to policy changes and misinformation, including claims by HHS Secretary Robert F. Kennedy Jr., which have weakened the safety net for disease prevention.

The U.S. public health system faces challenges from surging diseases like measles and hantavirus, linked to vaccine resistance and funding cuts. Health and Human Services Secretary Robert F. Kennedy Jr.'s policies and vaccine misinformation have exacerbated outbreaks, according to public health experts.

The U.S. public health system faces a surge in infectious diseases like measles and West Nile virus amid funding cuts and vaccine resistance. Health and Human Services Secretary Robert F. Kennedy Jr. has been criticized for policies and misinformation that may have worsened outbreaks, including hantavirus, cyclospora, and bird flu affecting animals and humans.

Santa Clara County has reported its first two human West Nile Virus cases of the year. The cases were announced by the Santa Clara County Public Health Department and local vector control officials during a news conference in San José.

West Nile virus has been detected in mosquitoes across all five boroughs of New York City. The virus, transmitted by mosquitoes, can infect humans, birds, horses, and other mammals, though many infected individuals show mild or no symptoms.

West Nile virus was detected in a mosquito on Langley Air Force Base in Hampton, prompting ground fogging operations to be moved forward to Wednesday night to reduce the risk of infected mosquitoes.

Tarrant County Public Health confirmed the first human West Nile virus case of 2026. The case is described as the severe neuroinvasive form of the disease.

A third mosquito trap sample collected in San Marcos on July 17 has tested positive for West Nile Virus, as reported by Hays County in a press release.

A third mosquito trap in Hays County has tested positive for West Nile virus. This marks the third positive test in the area.

Climate Central analyzed 239 U.S. cities and found an average increase of 18 'mosquito disease days' per year between 1970 and 2025, with Nashville experiencing a 22-day increase. Warmer temperatures extend mosquito activity, raising disease transmission risks like West Nile virus.

A human West Nile virus case has been confirmed in Boulder County. Officials recommend using EPA-registered insect repellent containing DEET, picaridin, or similar ingredients to reduce mosquito bite risks.

Mecklenburg County officials reported the first detection of West Nile virus in local mosquitoes and urged residents to take precautions. Recommendations include eliminating standing water, using insect repellent, and avoiding sweet-smelling scents to reduce mosquito bites.

West Nile virus was detected in mosquitoes in Mecklenburg County, North Carolina, according to state health officials. The exact location of the mosquito group remains unspecified, and officials noted the finding as of July 20.

West Nile virus was detected in mosquitoes collected in Mecklenburg County, North Carolina, with no human cases reported. The CDC notes it is the leading mosquito-borne illness in the U.S., and officials emphasize prevention measures like repellent and eliminating standing water.

Southern California is experiencing increased mosquito activity, with efforts to combat populations through sterile male mosquito releases. West Nile virus cases in mosquitoes have risen earlier than usual, though human infections remain low. An invasive Aedes aegypti species, capable of transmitting diseases like dengue and Zika, is also spreading in the region.

Louisiana confirmed its first 2026 West Nile virus case in Ouachita Parish, with infected mosquitoes detected in 13 parishes. The U.S. is experiencing its worst early-season West Nile surge in two decades, with 48 national cases reported by June 30, including 38 severe cases.

West Nile virus-positive mosquitoes have been reported in New York City and Long Island, according to the New York State Department of Health. The virus is more common during the summer.

The New York State Department of Health confirmed West Nile virus in mosquito pools across Nassau, Rockland, and Suffolk counties and advised residents to follow safety protocols to prevent potential outbreaks.

West Nile virus has been detected in mosquitoes and a wild bird in Wisconsin, marking the first confirmed cases of 2026. Health officials are urging the public to take precautions.

Los Angeles County officials confirmed the first human case of West Nile virus this year, urging residents to take mosquito precautions. An Antelope Valley resident was hospitalized with West Nile virus encephalitis after symptoms began in late June.

Los Angeles County reported its first case of West Nile virus in 2026, involving a very ill individual. The case occurs amid a nationwide surge in virus activity.

Los Angeles County officials reported the county's first case of West Nile virus in 2026, involving a very ill person. The incident occurs amid a nationwide surge in virus activity.

Los Angeles County confirmed its first human case of West Nile virus for the 2026 season. The Antelope Valley resident is hospitalized with West Nile virus encephalitis after symptoms began in June.

West Nile virus has been confirmed in mosquitos in Berkshire County, specifically in Pittsfield, as reported by the Massachusetts Department of Public Health.