![]() ![]() The Pfizer booster shot contains a full dose of the regular vaccine, or 30 micrograms. Newsletter sign-up: Get The COVID-19 Brief sent to your inbox.Seeing as they’re both the same type of vaccine, there’s also nothing wrong with mixing doses, Butt said, such as getting a Moderna booster shot after a double dose of Pfizer, or vice versa. “There aren't many studies looking at this but from what we have seen until now, there is no real difference in protection between the booster doses, whether you get Moderna or Pfizer,” he said in a phone interview with CTVNews.ca on Thursday. While data on booster efficacy continues to evolve, he said there isn’t enough of a gap to show that one booster performs better than the other. Zahid Butt is an infectious disease epidemiologist based in Waterloo, Ont. CTV News app sign-up: Breaking news alerts and top stories delivered right to youĮxperts say it doesn’t matter which of the two is received as a booster, as long as it’s an mRNA vaccine.ĭr.Based on NACI recommendations, it’s also clear that mRNA vaccines are the preferred boosters for most of the population. ![]() As more people become eligible for their third dose, and the number of Omicron cases in Canada continues to rise, it’s likely that more and more Canadians are wondering what type of booster shot to get.Īs of now, only mRNA vaccines are authorized for use as a booster in Canada – this includes both Pfizer-BioNTech and Moderna. This comes shortly after the release of new guidance from Canada’s National Advisory Committee on Immunization (NACI) regarding COVID-19 boosters. Ontario is one of the latest provinces to expand its booster dose eligibility, announcing that residents aged 18 and older will be able to book their third dose appointment as of Jan. ![]()
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