Thanks for the help. As it turns out my GP wouldn't give me the shot.
Strangely enough, a different pharmacist said it would be ok!
The doc said something about two of the 'strains' have been and gone and the third one in this year's batch is questionable.
I guess the Canadian government have already bought the stuff so they are gonna use it. It has to be of help in curtailing an epidemic I suppose...
My wife had hers regardless.