AstraSeneca Second Dose

At this time, the National Advisory Committee on Immunization (NACI) does NOT recommend that vaccines of different types (e.g., mRNA vaccine and viral vector vaccine) be used in the two-dose series, as data on the immune response following mixed vaccine schedules are not yet available. Further information from clinical trials and NACI’s recommendation are anticipated to be available in June 2021.

The province has advised that when the time comes to receive a second dose, everyone who received a first dose of the AstraZeneca vaccine will receive either an AstraZeneca or mRNA vaccine for their second dose pending further guidance.