Summary supplemental statement: Addendum to the guidance on the use of COVID-19 vaccines in the fall

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Organization: Public Health Agency of Canada

Date published: September 12, 2023

Pub.: 230370

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Beginning in the fall of 2023 for those previously vaccinated against COVID-19, NACI recommends a dose of the XBB.1.5-containing formulation of COVID-19 vaccine for individuals in the authorized age group if it has been at least 6 months from the previous COVID-19 vaccine dose or known SARS-CoV-2 infection (whichever is later).
Immunization is particularly important for those at increased risk of COVID-19 infection or severe disease, for example:

For the full addendum, please see Addendum to guidance on the use of COVID-19 vaccines in the fall of 2023.

What you need to know

For the full Fall 2023 COVID-19 NACI statement, including supporting evidence and rationale, please see Guidance on the use of COVID-19 vaccines in the fall of 2023.
For further information on NACI's recommendations on the use of COVID-19 vaccines, please refer to NACI: Statements and publications and the COVID-19 vaccine chapter in the Canadian Immunization Guide (CIG).


“With the authorization of the first XBB-containing COVID-19 vaccine, NACI is taking this opportunity to reaffirm the planning guidance we released this summer. A dose of XBB-containing COVID-19 vaccine is expected to offer better protection as we head into a respiratory virus season when we expect new SARS-CoV-2 variants to circulate. This will be most important for populations at highest risk of severe disease, including the elderly and individuals who are pregnant.  NACI is now busy considering ways to simplify the COVID-19 vaccine schedule going forward, and will be providing further guidance for those who have not yet been vaccinated.”

Dr. Shelley Deeks, NACI Chair

“In light of the recent COVID-19 vaccine authorization for individuals 6 months of age and older, I thank NACI for reaffirming their advice to people in Canada, particularly those who are at high risk, to receive a dose of XBB-containing COVID-19 vaccine this fall. This updated vaccine formulation is expected to better protect against the strains  circulating in our communities at this time. We know protection wanes over time; getting vaccinated when you are eligible will help build back your protection against COVID-19 over the fall and winter months. Vaccination layered with personal protective measures continues to be our strongest defense against COVID-19. I encourage people in Canada to take action to stay safe this respiratory virus season.”

Dr. Theresa Tam, Chief Public Health Officer

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