This Year’s Flu Vaccine Was Basically Worthless

This winter’s flu vaccine was a particularly bad match for the most common influenza strain in circulation, a new analysis from the Centres for Disease Control and Prevention found. Thankfully, the flu season was much milder than usual for the second year in a row, as ongoing covid-19 precautions likely blunted the spread of flu as well.
The estimates come from the CDC’s long-running surveillance program of people with suspected flu-like symptoms who visit various outpatient sites th