While mixing doses during a primary series is not recommended at this time, you may choose to receive a different vaccine for your booster shot if you have completed a primary series and are eligible for a booster. Some people may have a preference for the vaccine type that they originally received, and others may prefer to get a different booster. CDC’s recommendations allow for this type of mix and match dosing for booster shots.
For booster vaccination, CDC recommends eligible people age 5 and older receive an age-appropriate, updated Pfizer or Moderna vaccine that offers better protection against variants. The monovalent Novavax booster and the Johnson & Johnson primary and booster vaccinations are authorized for people 18 and older in limited situations.
For your primary vaccine series, you should get the same kind of vaccine for both doses to be as protected as possible. If you received one dose of your primary series and wish to complete your primary series with a different vaccine, please speak with your physician. You can’t make an appointment to receive another type of vaccine in your primary vaccine series, but most vaccination clinics allow walkup appointments, or you can request a different type of vaccine onsite, if available. Be sure to take a physician’s order with you, but please know it is up to the clinic to decide if it will honor the order.