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​​What:

The FDA has authorized the bivalent vaccine for Moderna and Pfizer for those 6 months and older. The previous vaccines were monovalent and targeted the original strain. The updated vaccines are bivalent and target both the original strain and the Omicron strains that have been causing more recent cases. Please see below for a brief description of who is eligible. For more details, including special situations for those who are immunocompromised, please see​​ the COVID-19 Vaccine Eligibility Chart. For more information on Booster and Additional Doses, see Related Materials at the top of the ​​page. ​

Eligibility:

Pfizer-BioNTech (Pfizer)

6 months through 4 years:

• ​​​Regardless of Immune Response:
  
• If unvaccinated, should receive three doses of bivalent vaccine.
• If received one or more monovalent doses in a primary series, should receive one or two doses of bivalent vaccine, as directed by your doctor.
• If completed the initial series, should receive a Bivalent Booster dose at least two months after the last monovalent dose.

5 years

• Regular Immunity:
  
• Should receive an Updated Bivalent Booster dose of Pfizer at least two months after completing their primary series or after their last monovalent booster dose.
  
• Compromised Immunity:
• Should receive an additional monovalent dose of Pfizer at least four weeks after receiving the second dose in their primary series.
• Should receive an Updated Bivalent Booster dose of Pfizer at least two months after completing their primary series or after their last monovalent booster dose.
  

5 through 64 years

• Regular Immunity:
• If unvaccinated, should receive one dose of bivalent vaccine.
• If received one or more monovalent doses in a primary series, should receive a single  Bivalent Booster dose  at least two months after the last monovalent dose.
• If completed the initial series, should receive a Bivalent Booster dose at least two months after the last monovalent dose. Eligible for only one bivalent vaccine dose.
• Compromised Immunity:
• If unvaccinated, should receive one dose of bivalent vaccine.
• If received one or more monovalent doses in a primary series, should receive one to two doses of bivalent vaccine at least two months after the last bivalent dose, as directed by your doctor.
• If completed the initial series, should receive a Bivalent Booster dose at least two months after the last monovalent dose.
• If received a bivalent booster dose, may receive one or more additional doses of bivalent vaccine at least two months after the last bivalent dose, as directed by your doctor.
  

Moderna 

6 months through 5 years

• Regardless of Immune Response:
• If unvaccinated, should receive two doses of bivalent vaccine.
• If received one or more monovalent doses in a primary series, should receive one or two doses of bivalent vaccine, as directed by your doctor.
• If completed the initial series, should receive a Bivalent Booster dose at least two months after the last monovalent dose.
  

6 through 64 years 

• Regular Immunity:
• ​If unvaccinated, should receive one dose of bivalent vaccine.
• If received one or more monovalent doses in a primary series, should receive a single Bivalent Booster dose at least two months after the last monovalent dose.
• If completed the initial series, should receive a Bivalent Booster dose at least two months after the last monovalent dose. Eligible for only one bivalent vaccine dose.
• Compromised Immunity:
  
• If unvaccinated, should receive one dose of bivalent vaccine.
• If received one or more monovalent doses in a primary series, should receive one to two doses of bivalent vaccine at least two months after the last bivalent dose, as directed by your doctor.
• If completed the initial series, should receive a Bivalent Booster dose at least two months after the last monovalent dose.
• If received a bivalent booster dose, may receive one or more additional doses of bivalent vaccine at least two months after the last bivalent dose, as directed by your doctor.