Quebec offering third doses to travellers not based in evidence: expert by Caryn Ceolin Last Updated Jul 27, 2021 at 1:46 pm EDT Tamara Dus, director of University Health Network Safety Services, administers a Pfizer-BioNTech COVID-19 vaccine at a hospital in Toronto on Monday, Dec. 14, 2020. THE CANADIAN PRESS/Frank Gunn Fully vaccinated Quebec residents who received the AstraZeneca COVID-19 vaccine or mix-and-match doses will have the option to get a third shot of either Pfizer or Moderna. The Quebec government is offering an extra dose of an mRNA vaccine to people who need to travel internationally and face being barred from entering countries where their vaccination status is not recognized.