Boosters

Think you’re up-to-date with your COVID-19 vaccinations? If you haven’t had a new, updated bivalent booster since Labor Day, you may not be. Children 6 months and older are now eligible for the updated bivalent dose. Review the information below to learn more. 


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Protect Yourself from the Worst of COVID-19

Regardless of the authorized or approved COVID-19 primary series type or boosters received, everyone ages 6 months to 4 years should receive their bivalent booster at least two months after completion of their final primary series dose with Moderna or everyone ages 5 and up at least two months after completion of their approved final primary series dose or the most recent monovalent booster dose.  

Children 6 months to 4 years

Children ages 6 months to 4  years are now eligible for the Pfizer updated bivalent primary series dose. Children ages 6 months to 5 years are now eligible for the Moderna updated bivalent booster. No Mix and Match is recommended for this age group.

Know when and what type of booster dose to get:

Pfizer: 6 months - 4 years

Primary Series

How many shots, and when?

3 shots – 3 weeks between the first two doses, third dose at least 2 months after the second

Updated Bivalent Primary Series Dose

Is a bivalent booster recommended? 

Only for children who have not yet received the third dose of their primary series

Other COVID-19 Vaccines

No Mix and Match is recommended for this age group.

Pfizer: 5 - 11 years

Primary Series

How many shots, and when?

2 shots – 2 doses, 3 weeks apart

Updated Vaccine (Bivalent Booster)

Is a bivalent booster recommended? 

Yes, at least 2 months after second shot or last booster

Other COVID-19 Vaccines

Is a different booster dose recommended?

Not at this time

Pfizer: 12 - 17 years

Primary Series

How many shots, and when?

2 shots – 2 doses, 3 weeks apart

Updated Vaccine (Bivalent Booster)

Is a bivalent booster recommended? 

Yes, at least 2 months after second shot or last booster

Other COVID-19 Vaccines

Is a different booster dose recommended?

Not at this time

Pfizer: 18 and older

Primary Series

How many shots, and when?

2 shots – 2 doses, 3 weeks apart

Updated Vaccine (Bivalent Booster)

Is a bivalent booster recommended? 

Yes, at least 2 months after second shot or last booster

Other COVID-19 Vaccines

Is a different booster dose recommended?

Not at this time

Moderna: 6 months - 5 years

Primary Series

How many shots, and when?

2 shots – 2 doses, 4 weeks apart

Updated Bivalent Booster

Is a bivalent booster recommended? 

Yes, at least 2 months after their final primary series dose.

Other COVID-19 Vaccines

No Mix and Match is recommended for this age group.

Moderna: 6 - 11 years

Primary Series

How many shots, and when?

2 shots – 2 doses, 4 weeks apart

Updated Vaccine (Bivalent Booster)

Is a bivalent booster recommended? 

Yes, at least 2 months after second shot or last booster

Other COVID-19 Vaccines

Is a different booster dose recommended?

Not at this time

Moderna: 12 - 17 years

Primary Series

How many shots, and when?

2 shots – 2 doses, 4 weeks apart

Updated Vaccine (Bivalent Booster)

Is a bivalent booster recommended? 

Yes, Pfizer bivalent at least 2 months after second shot or last booster

Other COVID-19 Vaccines

Is a different booster dose recommended?

Not at this time

Moderna: 18 and older

Primary Series

How many shots, and when?

2 shots – 2 doses, 4 weeks apart

Updated Vaccine (Bivalent Booster)

Is a bivalent booster recommended? 

Yes, at least 2 months after second shot or last booster

Other COVID-19 Vaccines

Is a different booster dose recommended?

Not at this time

Jansen (J&J): 18 years and older

Primary Series

How many shots, and when?

1 shot

Updated Vaccine (Bivalent Booster)

Is a bivalent booster recommended? 

Yes, at least 2 months after initial shot or last booster

Other COVID-19 Vaccines

Is a different booster dose recommended?

Not at this time

Novavax: 18 years and older

Primary Series

How many shots, and when?

2 shots - 2 doses, 3 weeks apart

Updated Vaccine (Bivalent Booster)

Is a bivalent booster recommended? 

Yes, at least 2 months after second shot or last booster

Other COVID-19 Vaccines

Is a different booster dose recommended?

Not at this time

Novavax: 12 -17 years

Primary Series

How many shots, and when?

2 shots - 2 doses, 3 weeks apart

Updated Vaccine (Bivalent Booster)

Is a bivalent booster recommended? 

Yes, Pfizer bivalent at least 2 months after second shot or last booster

Other COVID-19 Vaccines

Is a different booster dose recommended?

Not at this time


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chicago star Frequently Asked Questions  chicago star

This updated COVID-19 vaccine was designed specifically to target the omicron subvariants – the dominant virus currently circulating in the U.S. This is a big deal, and very different from the boosters previously offered – it generates a stronger immune response against current and future variants. This will protect individuals and communities from the dominant variant currently circulating in the U.S. as we head into the fall and winter months.

It's being called a "bivalent booster" because it's a mix of two versions of the vaccine — both boosting protection against original coronavirus strain as well as (newly) protecting against the BA.4 and BA.5 Omicron subvariants and potentially broadening the protection against future variants. A previous booster would have only protected against the original coronavirus strain.

Yes. Individuals are up-to-date when they have received their updated bivalent dose, either through their primary vaccine series or an updated single booster dose.

Bivalent boosters are authorized for everyone ages 6 months and up at least two months after completion of their final primary series dose with Moderna or people ages 5 and up at least two months after completion of their final primary series with any of the authorized or approved COVID-19 vaccines or the most recent monovalent booster dose.

You are not required to wait, but CDC says you may consider waiting 3 months from your most recent infection. Do not wait longer than this.

You can receive your updated vaccine (bivalent booster) at least two months after your last COVID-19 vaccine.

The updated vaccine uses the same technology as the prior Pfizer and Moderna vaccines, which have been safely administered billions of times.

Human trials were completed for an updated bivalent booster (original plus Omicron BA.1/BA.2) earlier this summer. These trials showed improved antibody response and no safety concerns, with the same side effect profile as earlier vaccines.  That version of the Omicron bivalent vaccine was then better matched to the “spike” protein of BA.4/BA.5, similar to how flu vaccines are matched each year to the circulating flu strains.

Before you get the updated vaccine, you’ll need to complete your primary series. Schedule your second dose now – then you can receive your updated vaccine (bivalent booster) at least two months after that shot.

CDPH recommends bringing your CDC vaccination card to your appointment.

You will get a new one. CDC recommends completing a second card and stapling the two cards together and both cards should be presented when vaccination history is required for travel, employment, or other purposes.

Only for those age 5 and up. Mix-and-match is not recommended for children under 5.

Yes, if a patient is eligible, both flu and COVID-19 vaccines can be administered at the same visit, as recommended by CDC and ACIP. In addition to flu vaccine, COVID-19 vaccine can be given with other vaccines as well, talk to your healthcare provider to learn more.

COVID-19 vaccines are available for everyone at no cost, including the updated vaccine (bivalent booster). Vaccines will continue to be given to all eligible people living in Chicago, regardless of insurance or immigration status.

Yes. The CDC and the American College of Obstetricians and Gynecologists recommend that pregnant and recently pregnant people receive a bivalent mRNA COVID-19 vaccine booster dose following the completion of their last COVID-19 primary vaccine dose two months after their primary series dose or monovalent booster.


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