New COVID-19 Vaccine Boosters Perform Poorly Against Symptomatic Infection: CDC Study

A healthcare worker prepares COVID-19 vaccines at a clinic in Florida on May 20, 2021. Joe Raedle/Getty Images

The new COVID-19 vaccine boosters provide poor protection against symptomatic infection, according to a U.S. Centers for Disease Control and Prevention (CDC) study published on Nov. 22.

Absolute vaccine effectiveness was 50 percent or lower among people who received one of the new bivalents after receipt of two or more original vaccine doses, researchers with the CDC estimated.