Booster Shots

Updated August 24, 2022

Booster shots are available and strongly recommended for most Manitobans. For some individuals, a second booster shot is now recommended to maintain your protection.

FIRST BOOSTER SHOTS: Everyone aged 5 and up is now eligible for a booster shot (third dose) of a COVID-19 vaccine. See full recommendations below.

SECOND BOOSTER SHOTS: A second booster dose is now recommended for some individuals. See recommendations below

BIVALENT (OMICRON) BOOSTER SHOTS: A new bivalent booster shot that also targets the Omicron variant is now available. All adults age 18+ are eligible. It is recommended to wait six months from your last dose to get the bivalent booster dose, or at least a minimum of three months. 

Talk to your doctor about a COVID-19 booster shot, or use our Vaccine Finder to locate a doctor near you.

Did you have COVID-19 recently? You should still get your booster, but for most people it is recommended to wait about about six months before your next dose.


Jump to booster eligibility for:


First Booster Shot – Ages 5 and Up

Generally, a first booster shot is available to everyone age 12 and up a minimum of four months after you received your second dose. For children age 5-11, a booster is recommended six months after your second dose. You can check the date of your second dose here.

Immuno-Compromised Individuals (age 5+): Doctors strongly recommend a third dose, and a booster shot, for individuals who are moderately to severely immuno-compromised. A third dose should be given at least 28 days after the second dose, and for those age 12+ a fourth dose, or first booster, should be given four months after their third dose. See below for the definition of moderately to severely immuno-compromised.

Second Booster Shot – Specific Groups Only

A second booster shot is now strongly recommended for specific groups four months after their first booster dose. In Manitoba, the following groups are eligible:

  • Residents of personal care homes and elderly persons housing congregate living sites (such as supportive housing and assisted living) with no age limit.
  • Individuals aged 50 or older who live in the community.
  • First Nations, Inuit and Metis people aged 30 or older, regardless of where they live.
  • Immuno-compromised individuals, age 18+.

The second booster should be administered at least four months after the first booster shot, and Pfizer or Moderna is recommended.

For most people, the second booster dose will be their fourth dose of vaccine (i.e. a two-dose primary series followed by two booster shots). For immuno-compromised individuals, this will be their fifth dose because their initial series included three vaccine doses to offer stronger protection against COVID-19. Their second booster dose should also be given four months after their first booster. 

All individuals age 12+ will be eligible for another booster as of September 12.


Boosters for Children and Youth

Currently, booster doses are not yet recommended for all children and youth.

All youth aged five and up can receive a booster shot (3rd dose). A booster is strongly recommended for those who are immuno-compromised or have an underlying health condition that increases their risk for severe illness from COVID-19.

  • Immuno-Compromised Individuals (age 6 months and older): Doctors strongly recommend a third dose for individuals who are moderately to severely immuno-compromised to complete their primary series. Boosters are also recommended for some age groups. A third dose should be given at least 28 days after the second dose, and for those age 5+ a fourth dose, or first booster, should be given four to six months after their third dose. See below for the definition of moderately to severely immuno-compromised.
  • Youth with Underlying or Chronic Medical Conditions (age 5-17): Because youth with underlying or chronic conditions could be at higher risk of serious illness from COVID-19, a booster shot should be considered 4-6 months after their last dose. If someone in this age group has any of the following conditions, please talk to your doctor about the benefits and risks of a booster dose. Conditions include:
    • Cancer (active treatment)
    • Chronic diseases of the kidney, lung (including uncontrolled asthma), liver, or heart (includuing pulmonary hypertension)
    • Cystic fibrosis
    • Diabetes (type 1 and 2)
    • Down syndrome
    • Neurodevelopmental and other chronic neurologic conditions such as epilepsy and cerebrovascular disease
    • Obesity (BMI of 30 or higher)
    • Substance use disorder
    • Pregnancy
    • Sickle cell disease or thalassemia
    • Immuno-compromised condition or treatment (see section below for details)
    • Medically fragile or having medically complex needs
  • Youth residing in a congregate living setting (age 12-17): Individuals, including youth, living in large group settings may be at higher risk of serious illness or outcomes from  COVID-19. These setting could include shelters, group homes, quarters for migrant workers and correction.
  • Youth who belong to racialized and/or marginalized communities disproportionately affected by COVID-19 (Age 12-17)

Immuno-Compromised Eligibility

Doctors and scientists have monitored the immune response carefully. For individuals age 6 months and older who are considered moderately to severely immuno-compromised, a third dose is recommended to complete their COVID-19 vaccination series. For those age 5 and older, a booster shot (fourth dose) is also recommended to maintain the best protection.

  • Third doses should be given at least 28 days after the second dose.
  • Booster shot (4th dose) should be given 4-6 months after the third dose.
  • Second booster shot (5th dose) should be given 4 months after the fourth dose, if eligible (see above).

Individuals are considered moderately or severely immuno-compromised if they:

  • Have cancer and are receiving active chemotherapy (or immunotherapy including CAR-T therapy)
  • Have received a solid organ transplant and are receiving chemotherapy or other immuno-suppressive therapy
  • Were born with a moderate or severe dysfunction of their immune system
  • Are living with untreated or advanced (stage 3 or advanced) HIV-AIDS
  • Are taking certain medications that severely affect the immune system, including:
    • Anti-B cell therapies
    • High-dose systemic corticosteroids
    • Alkylating agents, antimetabolites, or tumornecrosis factor (TNF) blockers
    • Other biologic agents that are significantly immuno-suppressive, including TNF blockers, certain biologic agents (e.g., rituximab), mycophenolate, tacrolimus, Jak inhibitors, methotrexate, fingolimod, azathioprine and leflunomide

The following individuals may benefit from a third dose and booster shot, but should consult their doctor for individual advice. This includes those who

  • Are receiving dialysis (hemodialysis and peritoneal dialysis)
  • Are on the organ transplant list
  • Have a ventricular assist device (VAD)

Further information about eligibility for third doses is available from Manitoba Health.