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    • mixing and matching

    Two vials of the Pfizer-BioNTech vaccine sit on a table at a COVID-19 vaccination clinic in Halifax on Monday, May 24, 2021. THE CANADIAN PRESS/Andrew Vaughan

    NACI approves mixing COVID vaccines: What you need to know

    Vaxx Populi: If you got a first dose of AstraZeneca, you can choose to get an mRNA vaccine for your second dose. Pfizer and Moderna will also be interchangeable as second doses.