The new bivalent booster (released 9/1/22) provides both additional immunity against the original coronavirus strain and also protects against the newer Omicron variants.
Pfizer’s updated booster shot is recommended for individuals 12 and older
Moderna’s updated booster shot is recommended for adults 18 and older.
Eligible individuals can get either the Pfizer or Moderna updated booster, regardless of whether their primary series or most recent dose was with Pfizer, Moderna, Novavax, or the Johnson & Johnson vaccine.
As per the CDC’s recommendations, the new bivalent booster replaces the existing/original (monovalent) vaccine booster. That vaccine will no longer be used as a booster in people age 12 and up.
The CDC recommends that everyone who is eligible stay up-to-date on vaccinations by getting an updated booster dose at least 2 months after their last COVID-19 shot whether it was the last booster dose, or since completing their primary series.