Canada: Pfizer, Moderna preferred 2nd dose after AstraZeneca

[2greys]

Canada’s National Advisory Committee on Immunization says it is now recommending people who got the AstraZeneca vaccine first should get Pfizer-BioNTech or Moderna for their second shot.

On June 1, committee had said AstraZeneca recipients “could" get Pfizer or Moderna for their second shot if they wanted, but Thursday went further to say an mRNA vaccine was the ”preferred" choice.

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.

independent.co.uk/news/cana...

[cofdrop-UK]

Really interesting - thank you. Cx

[knitter]

Fascinating programme on vaccines on BBC I player .How the different Corona virus vaccines were produced....my admiration goes out to the scientists , the work that they do is way beyond my comprehension , but amazing to watch and try to understand a little.

[Alberta56]

I wonder if that procedure will be adopted over here. Scientists are on a learning curve about vaccinations.