For either the elderly or the immunocompromised. I can only take this to mean there is not sufficient evidence of benefit vs risk.
Feb 24 (Reuters) – There is not sufficient evidence to recommend more than one COVID-19 booster shot a year for older people and those with weakened immune systems, an expert advisory group to the U.S. Centers for Disease Control and Prevention (CDC) said on Friday.
The CDC advisers did not vote on new recommendations for how the COVID-19 shots should be administered on Friday.
In fact the CDC did not vote on new recommendations for how the jabs should be administered. Curious.