Canada: Pfizer, Moderna COVID-19 vaccine preferred 2nd dose after AstraZeneca
Fox News
Canada's National Advisory Committee on Immunization said Thursday people who got the AstraZeneca vaccine as their first dose should get Pfizer-BioNTech or Moderna for their second shot.
Since the advisory committee "first looked at mixed vaccine schedules, new evidence is starting to emerge suggesting immune responses are better when a first dose of the AstraZeneca vaccine is followed by an mRNA vaccine as a second dose,″ said its vice-chair Dr. Shelley Deeks, in the new guidance documents. The committee also updated its previous recommendation that people at high risk of exposure to, or serious illness from, COVID-19, could opt to get AstraZeneca rather than waiting for Pfizer or Moderna. Now it says everyone should always get the mRNA vaccines first, unless they are allergic to them.
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