OTTAWA — Dr. Joss Reimer, medical lead for Manitoba’s Vaccine Implementation Task Force, says that new vaccine recommendations from the National Advisory Committee on Immunization on mixing mRNA vaccines will be a form of trial and error.
“Well in some ways, during a pandemic everything we do is a big human experiment,” she said in an interview with CTV’s Question Period airing Sunday. “Because we’re all having to learn together at the same time, about what works the best.”
On Tuesday, NACI changed its guidelines to allow for Canadians to mix and match AstraZeneca with either mRNA vaccine from Moderna or Pfizer. There was no current data on the interchangeability of mRNA vaccines.
Chief Public Health Officer Dr. Theresa Tam says NACI still recommends sticking with the same mRNA vaccine regime for both doses, but that you can mix if there are problems with availability.