NACI’s latest AstraZeneca vaccine advice leaves Canadians confused

The National Advisory Committee on Immunization (NACI) recommends Canadians get an mRNA COVID-19 vaccine (from Pfizer-BioNTech or Moderna) for their second COVID-19 vaccine dose, even if their first shot was the Oxford-AstraZeneca vaccine. Mike Le Couteur explains why the advice has changed, the criticism against NACI, and what could possibly happen to unused Oxford-AstraZeneca doses.

• AstraZeneca vaccine recipients frustrated by ‘mixed messages’ from Canadian authorities