News FDA panel supports Moderna COVID-19 booster shots for older Americans and other adults at higher risk of infection October 14, 2021Karen Weintraub and Elizabeth Weise, USA TODAYComments Off on FDA panel supports Moderna COVID-19 booster shots for older Americans and other adults at higher risk of infection The Moderna COVID-19 booster shot will be a half-dose of the vaccine already given. Data showed it was safe and as effective at the lower dose.