Despite a 'double-barreled' flu season, the vaccine is mostly doing its job

Despite a weird flu season, this year’s flu shot is working relatively well to prevent influenza, particularly among children, according to a new report.

In the new report, researchers from the Centers for Disease Control and Prevention (CDC) estimated the flu shot’s effectiveness in more than 4,000 U.S. children and adults who visited the doctor for respiratory illness between Oct. 23, 2019, and Jan. 25, 2020.