50% of the people do not respond well for H1N1 vaccination, reason being the fear of unsafe vaccination. Almost all of them have same question, that if H1N1 vaccine is safe!

According to Health Canada, based on the results of thousands of clinical trials around the world, it is satisfied the vaccine is safe. And the adjuvant, a chemical product that boosts the immune response, has been tested on thousands with the H5N1 avian flu drug and proven effective, the regulator says.

The vaccine confers more than 90-per-cent immunity in healthy adults, more than the seasonal flu vaccine. Researchers cannot do studies in millions of people before licensing a vaccine, which would be too time-consuming during a pandemic. Post-licensing surveillance, in which people report their side effects, will be conducted in Canada.