Covid19 – Canada to mix and match vaccines for easier rollout
Canada has changed its guidelines on mixing doses of Covid-19 vaccines, the country’s health agency said Tuesday, and Canadians may get a different type of for their second shot. People who received one of the two mRNA vaccines Pfizer’s or Moderna’s may get either of the two brands for the second dose.
The announcement from the Public Health Agency of Canada (PHAC) was based on an updated guidance from the National Advisory Committee on Immunization (NACI), which recommended that a first dose of the AstraZeneca vaccine, including the Covishield version manufactured by the Serum Institute of India, could be followed by a second dose of either the Pfizer-BioNTech or Moderna vaccine. But it is not recommending AstraZeneca after a first shot of Pfizer or Moderna because of safety concerns and limited data on the use of this combination.
“NACI has worked to quickly adapt this guidance on the use of COVID-19 vaccines in Canada to ensure optimal protection of Canadians at pace with the ever-changing circumstances during this pandemic,” Canada’s Chief Public Health Officer Theresa Tam said at a press conference.
More than 13 million people have received at least one dose of the Pfizer vaccine in Canada, in contrast to over 3.5 million of the Moderna vaccine and more than 2.1 million of the AstraZeneca vaccine as of May 22, according to the Public Health Agency of Canada.