Credit: The National Collaborating Centre for Infectious Diseases (NCCID) and the Public Health Agency of Canada (PHAC)

This moderated and live webinar includes a presentation and discussion on the Recommendations of the National Advisory Committee on Immunization (NACI) on Extended Dose Intervals and Effectiveness of  COVID-19 Vaccines, with live Q&A to inform health care and vaccine providers. This webinar is hosted by the National Collaborating Centre for Infectious Diseases (NCCID), in collaboration with the Public Health Agency of Canada (PHAC).


Presentation highlights:

  • To provide a brief overview of NACI guidance in the context of public health decision making
  • To describe the efficacy and effectiveness of COVID-19 vaccines in the context of one or two doses
  • To discuss the impacts of extended dose intervals of COVID-19 vaccines
  • To present the NACI recommendations on extended dose intervals


English Session:

Wednesday, May 5, 2021

1:00 pm – 2:00 pm EDT

Moderator: April Killikelly, PhD, PHAC

Participants: Dr. Robyn Harrison, NACI; Dr. Jesse Papenburg, NACI; Dr. Bryna Warshawsky, PHAC; Austin Nam, PhD, PHAC; and Beate Sander, PhD, NACI

Register: Click here


French Session:

Friday, May 7, 2021

1:00pm – 2:00 pm EDT

Moderator:  Lindsay Colas, PHAC

Participants: Dr. Jesse Papenburg, NACI; Dr. Robyn Harrison, NACI; Dr. Philippe De Wals, NACI

Register : Click here


Please note, due to time limitations, not all questions can be answered.

The same presentation will be delivered in English and in French.


The webinars will be recorded and available on the NCCID website immediately following each event.

For any registration difficulties, please contact NCCID:


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