False. Less effective <> ineffective.
New information from the U.S. Centers for Disease Control and Prevention showed that the two-dose mRNA vaccines, like Pfizer and Moderna, are only 35 percent effective against the omicron variant of COVID-19.
“A COVID-19 vaccine booster dose restores vaccine effectiveness against infection to 75 percent,” the CDC said Monday. “COVID-19 vaccination decreases the risk of severe disease, hospitalization, and death from COVID-19.”