From the Halifax Daily News:
Cdn doctors urged to get legal protection if giving cross-border flu shots
The organization that insures Canadian doctors is urging them to arm themselves legally if they are giving flu shots to Americans crossing the border because of vaccine shortages in the United States.

The Canadian Medical Protective Association says it has no problem with the practice, so long as doctors are getting U.S. patients to sign waivers stating that in the event they decide to take legal action, they'll do it in Canadian courts.