Canadians who got AstraZeneca COVID-19 vaccine as 1st dose confused

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The National Advisory Committee on Immunization (NACI) recommends Canadians get an mRNA COVID-19 vaccine (from Pfizer-BioNTech or Moderna) for their second COVID-19 vaccine dose, even if their first shot was the Oxford-AstraZeneca vaccine.

Mike Le Couteur explains why the advice has changed.

While it’s at the centre of confusion in Canada, AstraZeneca’s shot is being used around the world.

Crystal Goomansingh looks at how each country’s guidelines compare.

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