“COVID-19 vaccine effectiveness against hospitalization turned negative over time, according to U.S. Centers for Disease Control and Prevention (CDC) data presented on June 15.
The effectiveness against hospitalization plummeted to negative 8 percent for people who received one of the old COVID-19 vaccines, according to data from a CDC-run hospital network.
A dose of one of the updated bivalent vaccines moved the protection above zero, to 29 percent, but the protection fell back to negative 8 percent beyond 89 days, the data show.”