Is there really a preferred vaccine? NACI under fire after new guidance conflicts with earlier advice
The National Advisory Committee on Immunization (NACI) is being criticized for muddling messages about vaccines. It now suggests some Canadians wait for mRNA shots from Pfizer or Moderna if possible, rather than viral vector doses from AstraZeneca and Johnson & Johnson. But as David Akin reports, federal officials are still encouraging Canadians to get the first shot offered to them.