Los Angeles Times An unusual surge in flu viruses detected at wastewater treatment plants in California and other parts of the country is raising concerns among some experts that H5N1 bird flu may be spreading farther and faster than health officers initially thought. In the last several weeks, wastewater surveillance at 59 of 190 U.S. … Continue reading Flu season is over, but there is a viral surge in California wastewater. Is it avian flu?