Since the mass immunization began in Winnipeg Monday, two people have had rare allergic reactions to it, according to the Winnipeg Regional Health Authority.
"We have had two incidents involving some allergic-type symptoms," said Dr. Sande Harlos, a WRHA medical officer of health. "This is what we're prepared to deal with."
The maker of the H1N1 vaccine, GlaxoSmithKline, warns that up to one in 1,000 doses may result in an allergic reaction leading to a "dangerous decrease of blood pressure."
Don't forget to read down to end of the linked article, because there is a 1-2 paragraph discussion of thimerosal and how it is basically harmless (NOT!).
Thimerosal is a mercury-based preservative. In large concentrations, or over extended periods of exposure, mercury can cause damage to the brain and kidneys. However, the Public Health Agency of Canada says the amount of mercury in the H1N1 flu vaccine is significantly less than in a can of tuna.
Source: Winnipeg Free Press