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MagdyY's blog

I got my flu shot, did you?

On average, an estimated 12,500 Canadians are admitted to hospital each year for complications arising from the flu and about 3,500 die, according to the Public Health Agency of Canada. There are three types of influenza viruses: A, B and C. Human influenza A and B viruses cause seasonal epidemics in North America almost every winter, says the U.S. Centers for Disease Control. Traditional ; ;seasonal flu shots — known as trivalent vaccines —are configured to protect against two A strains, H3N2 and H1N1, and one of two B-lineage influenza viruses. About 12 million doses have been ordered by the provinces and territories for publ ic immunization programs, including about 2.9 million doses of quadrivalent vacc ine, at a cost to the jurisdictions of about $75 million. "Perhaps people think a 50 per cent vaccine effectiveness isn't great and they wonder: is it still worthwhile?" But to put it in context, "if I were to give to you a discount coupon that gave you 50 per cent off your grocery bill at the checkout stand, you would probably think that was great.