The U.S. Food and Drug Administration has authorized a single booster dose for all individuals 18 and older who have had their primary vaccinations. The booster would be given six months after the primary series with Moderna or Pfizer, and two months after Johnson & Johnson.

The move now goes to the CDC’s Advisory Committee on Immunization Practices for recommendations today, and then must be authorized by the CDC director to be put into practice. The CDC has said it is determined to work quickly, meaning the move could be cleared by Friday evening. Boosters have already been authorized for people 65 and older and those at high risk.