https://www.mercurynews.com/2021/10/14/f-d-a-panel-approves-moderna-vaccine-boosters-for-high-risk-americans/

Following the steps taken for the Pfizer vaccine, a federal committee on Thursday voted to offer the Moderna vaccine booster to people who are at highest risk of serious COVID-19 disease because of their age, underlying health conditions or who have a high risk of viral exposure where they work or live.

There is not yet enough strong evidence to recommend the booster to the general population, the group agreed.