Canada allows mixing and matching Covid vaccines for first, second shots

Canada's National Advisory Committee on Immunization (NACI) has announced its updated guidance to allow mixing and matching approved Covid-19 vaccines in most scenarios. Under the updated guidance, people who received a first dose of the AstraZeneca vaccine may receive Pfizer-BioNTech or Moderna for their second dose, unless contraindicated. Four vaccines, developed by Pfizer, Moderna, AstraZeneca and Johnson & Johnson, have been authorized for use in Canada to date, Xinhua reported.

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