"In this context, the priority of the vaccination teams is to ensure that the doses of Pfizer are in sufficient quantity to continue the vaccination activities already planned and to honour the appointments made", the statement read.
Another 210,638 shots of a COVID-19 vaccine were administered Thursday for a total of nearly 12.2 million doses.
The premier of British Columbia received a second dose of AstraZeneca's COVID-19 vaccine on Friday, following updated national immunization recommendations that have left some Canadians scratching their heads.
The news comes as more than 75 per cent of eligible adults in B.C. have received a first dose of a COVID-19 vaccine as the province reported 109 new cases of the virus.
Still, some B.C. pharmacies that are now administering second doses of AstraZeneca vaccine said they have received a wave of cancellations since the announcement.
NACI also cited the rare risk of vaccine-induced immune thrombotic thrombocytopenic, or VITT, associated with AstraZeneca.
Provincial health officer Dr. Bonnie Henry said the panel's recommendation arises from a small study in Germany, but other studies show all vaccines provide excellent protection from COVID-19 and two doses of any of the vaccines are safe and effective.
The mixed-dose schedule was slightly better than two doses of Pfizer at producing the neutralizing antibodies and killer T cells that are critical to preventing infection or serious illness.
Henry said people in B.C. can feel safe that picking AstraZeneca for their vaccine "was a good choice to make".
Nearly 25 million Canadians have now received at least one dose of vaccine, and nearly six million are now fully vaccinated.
As of June 5, 2.1 million people had received one dose of AstraZeneca, and 15,186 had received two doses.
There are no further shipments of AstraZeneca now scheduled, but there are about 600,000 doses still left from previous deliveries.
The donation won't cost Canada anything, and will be on top of the 44 million doses Canada has purchased directly from Moderna. Across Africa, nations have given out three doses for every 100 people. "We don't know that definitively, and we may not know that for some time".