You might want to check into this a bit further, Islandgem. According to the Reuters News Agency, the provinces of Alberta and Ontario reported stopped using the AZ COVID vaccine last month. According to CTV News today, the Canadian National Advisory Committee on Immunization (NACI) is now recommending that those individuals who received the first dose of the Oxford/AstraZeneca vaccine should now move forward and try to receive a second COVID vaccine based on mRNA technology (i.e. Pfizer/BioNtech or Moderna).