As US flu cases continue to slow, influenza B picks up
The rate of outpatient visits for influenza-like illnesses (ILI) dropped again this week to 2.5%, down from 2.7% in the previous week, and influenza B continues to cause an increasing percentage of flu cases, according to the latest influenza surveillance data reported today by the Centers for Disease Control and Prevention (CDC).
This is the 18th week ILI has been at or above the national baseline, which is 2.2%.