Canada recommends mixing and matching AstraZeneca, Pfizer and Moderna COVID-19 vaccines

Canada recommends mixing and matching AstraZeneca, Pfizer and Moderna COVID-19 vaccines
Canada is changing its guidelines on mixing and matching second doses of COVID-19 vaccines and is now advising Canadians to combine either the AstraZeneca-Oxford, Pfizer-BioNTech or Moderna shots interchangeably in certain situations.
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