The state’s first West Nile virus (WNV) case of the 2025 season has been reported in a Vanderburgh County resident. To protect patient privacy, the Indiana Department of Health (IDOH) is not releasing any additional information about the case.
  
IDOH expects to see additional West Nile virus cases as the mosquito season progresses. Taking precautions against mosquitoes can reduce the risk of disease caused by mosquito-borne viruses such as West Nile virus, Eastern equine encephalitis (triple-E) virus, and La Crosse virus.  

“We have already had mosquitoes test positive for WNV this season,” said State Health Commissioner Lindsay Weaver, M.D., FACEP. “With large amounts of recent rainfall and projected high temperatures continuing this week, Hoosiers in all parts of the state should take steps to remove breeding sites around their homes.”  

West Nile virus activity has been detected in mosquitoes throughout the state (56 samples taken from 15 counties). Visit the Indiana Mosquito-Borne Activity Dashboard to learn more.

Indiana reported 11 human WNV cases in 2024.