The FDA also authorized using the bivalent formula in all Covid vaccines moving forward and is doing away with the multi-dose primary series for people who have not yet been vaccinated. The FDA’s decision will now be handed off to the Centers for Disease Control and Prevention, which has scheduled a meeting with its panel of outside advisers for Wednesday. Tuesday's move comes several months after an advisory committee to the FDA raised doubts about moving to yearly Covid boosters for most adults and children, but appeared to be supportive of multiple doses for the most at-risk Americans, like older people or people with weakened immune systems