Starting TODAY - Fourth Doses of COVID-19 Vaccine for Immunocompromised Individuals

The province is continuing to take action to protect our most vulnerable Ontarians from COVID-19 and the Omicron variant, by offering a fourth dose (booster) of the COVID-19 vaccine to immunocompromised individuals.

Fourth doses are currently available after three months (84 days) following a third dose to residents of long-term care homes, retirement homes, elder care lodges, and other congregate settings that provide assisted living and health services.

Starting today at 8:00 a.m., immunocompromised Ontarians can schedule their fourth dose. 

  • Call the Provincial Vaccine Contact Centre at 1-833-943-3900
  • Reach out to participating pharmacies 
  • SMDHU can assist you to find a location, mobile or pop-up clinic, or GO-VAXX bus to get your fourth dose

Eligible individuals can include those who are:

  • a transplant recipient (including solid organ transplant and hematopoietic stem cell transplants)
  • receiving stable, active treatment (chemotherapy, targeted therapies, immunotherapy) for a malignant hematologic disorder or solid tumor
  • in receipt of chimeric antigen receptor (CAR)-T-cell
  • an individual with moderate or severe primary immunodeficiency (for example, DiGeorge syndrome, Wiskott-Aldrich syndrome)
  • Stage 3 or advanced untreated HIV infection and those with acquired immunodeficiency syndrome
  • undergoing active treatment with the following categories of immunosuppressive therapies: 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 or are taking specific immunosuppressant medications 
  • receiving dialysis (hemodialysis or peritoneal dialysis)

Both Moderna and Pfizer vaccines provide strong protection against COVID-19 and the Omicron variant. It is safe to mix vaccines and the best vaccine for your booster is the first one available.

Information on COVID-19 Boosters