Individuals 12-17 years of age:

• The Ontario Ministry of Health recommends 6 month interval between 2nd dose and 3rd dose booster
• May receive 3rd dose booster if it has been at least 3 months since 2nd dose, and with informed consent
• For individuals who recently had COVID-19 infection, should be at least 3 months since symptom onset or positive test (if asymptomatic)
• Vaccine type: Pfizer 

Individuals 18+ years of age:

• Must have received 2nd dose at least 3 months ago
• For individuals who recently had COVID-19 infection, should be at least 3 months since symptom onset or positive test (if asymptomatic)
• Pfizer boosters available for those 18+ years old
• Moderna boosters available for those 30+ years old

Individuals 18+ years of age:

• The Ontario Ministry of Health recommends interval of 5 months after 3rd dose booster
• May receive 4th dose booster at a minimum of 3 months after 3rd dose booster with informed consent
• For individuals who recently had COVID-19 infection, should be at least 3 months since symptom onset or positive test (if asymptomatic)
• Pfizer boosters available for those 18+ years old
• Moderna boosters available for those 30+ years old

Three-dose primary series

• Some individuals who are immunocompromised can get a 3rd dose at 8 weeks after their 2nd dose as part of an extended primary series — including eligible children aged 5 to 11 years old

Boosters

• 4th dose booster available for immunocompromised individuals 12+
  • Must have received 3rd dose at least 6 months ago
• 5th dose boosters available for immunocompromised individuals 18+
  • Must have received 4th dose at least 3 months ago
• For individuals who recently had COVID-19 infection, should be at least 3 months since symptom onset or positive test (if asymptomatic)

Individuals who are moderately or severely immunocompromised:

• Receiving active treatment (such as chemotherapy, targeted therapies, immunotherapy) for solid tumour or hematologic malignancies
• Solid-organ transplant recipients taking immunosuppressive therapy
• (CAR)-T-cell therapy or hematopoietic stem cell transplant recipients (within 2 years of transplantation or taking immunosuppression therapy)
• Have moderate to severe primary immunodeficiency (such as DiGeorge syndrome, Wiskott-Aldrich syndrome)
• Have stage 3 or advanced untreated HIV infection and those with AIDS
• Receiving active treatment with specific immunosuppressive therapies, including anti-B cell therapies (monoclonal antibodies targeting CD19, CD20 and CD22), high-dose systemic corticosteroids, alkylating agents, antimetabolites, or tumor-necrosis factor (TNF) inhibitors and other biologic agents that are significantly immunosuppressive

Other important information:

• Timing of booster dose should be decided with your treating provider in order to optimize the immune response from the vaccine and minimize delays in management of your underlying conditions
• Must bring a proof of treatment note from your care provider, or a list of medications when you arrive at the vaccine clinic

• Must provide a form of photo ID with name and birthdate, such as a government-issued ID if you have one
• Please bring the vaccination receipt for your last dose, if you are able (download a copy from the Ministry’s COVID-19 Vaccination website)
• If your first vaccination dose(s) was with a non-Health Canada approved vaccine, please bring proof of your vaccination status