From USA Today:
Looking north for flu vaccine
Many of internist Michael Chase's older patients order prescription drugs from Canada to save money. Given the U.S. shortage, they figured, why not order a flu shot along with their cholesterol-lowering medication?

Chase had no vaccine. His usual supplier had ordered it from Chiron, which had been expected to supply up to 48 million doses to the United States before British authorities suspended its license.

So Chase and his partner, Philip O'Keefe, who practice in San Francisco, followed the example of Illinois, New Mexico and New York City and sought flu vaccine from foreign sources.