INDIANA – Wastewater surveillance data through March 26, 2025, reveals some key trends in respiratory viruses across Indiana.
While Influenza A concentrations are declining, Influenza B is rising, showing a steady increase in concentration and detections. Flu A is categorized as “High” in Bloomington and South Bend and “Medium” in Carmel. In contrast, Flu B is “High” across Indiana, with no significant trend observed.
COVID-19 continues to be categorized as “High” nationally, although concentrations have decreased by 30% since February. Within Indiana, COVID-19 levels are “Medium,” with a downward trend noted in Bloomington but no trend in South Bend or Carmel.
While still in the “High” category nationally, Norovirus levels are showing a decreasing trend. However, in Indiana, Norovirus remains “High,” with no trend and high concentrations detected.
Respiratory Syncytial Virus (RSV) in Indiana is in the “High” category with no trend and high concentrations.
National RSV remains in the “High” category nationally, with high concentrations and a downward trend over the last 3 weeks.
Avian Flu (the flu A subtype associated with H5N1 or avian influenza) H5 has not been detected in Indiana wastewater.
National H5 has been detected in 77 wastewater SCAN sites across 25 states, including Kentucky, Minnesota, and Florida. A nationwide heat map of H5 detections is linked here.
Visit WastewaterSCAN to learn more about wastewater monitoring data for infectious diseases in Indiana and nationally.
