Dr. David Butler-Jones says there is little chance Canada wouldn't push ahead with a vaccination program in the fall, once vaccine has been produced.
He says safety trials of the new vaccine will have to be conducted.
And decisions still have to be made about whether all population groups will need to be vaccinated and in what order they will be asked to line up for vaccine.
Those decisions will be made in the coming weeks, based on continued study of who the virus is infecting here and in the Southern Hemisphere.
But Butler-Jones says it's clear the new H1N1 virus is spreading around the globe and is capable of causing severe disease, sometimes in previously healthy young people.