At least 15 states have very high levels of influenza, according to the Centers for Disease Control and Prevention.

A team of scientists at the Helmholtz Institute for RNA-based Infection Research (HIRI) in Würzburg and the University of ...

Illinois, Indiana, Michigan, Minnesota, Ohio and Wisconsin had the highest rates, with 9.2 percent of tests coming back positive.

Twenty states (plus D.C.) had "very high" levels of the virus present in wastewater, an increase from 16 states the week before.