Nation Moderna, J&J booster shots could be available as soon as Friday: COVID-19 updates October 21, 2021October 21, 2021Jeanine Santucci, USA TODAYComments Off on Moderna, J&J booster shots could be available as soon as Friday: COVID-19 updates A federal committee is expected to vote Thursday on whether to allow booster shots for the Moderna and Johnson & Johnson COVID vaccines. Latest news.