First doses of the COVID-19 vaccines are now quickly rolling out across Canada and in light of recent news, Mass General Hospital’s Dr. Mark Poznansky discusses the topic of mixing and matching vaccines, and what the future of a COVID-19 booster shot could look like. Listen to the full @SXMCanadaTalks interview with host Matt Gurney here: https://soundcloud.com/canadatalks/dr-mark-poznansky-joins-the-daily-edition-with-matt-gurney

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