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Yes. It is estimated to be effective in approximately 90% of people who get the vaccine. Some are unable to achieve immunity from vaccines due to an ineffective immune system or due to medicines they take. These are also included in this number, so it is slightly skewed for a real picture of the efficacy. Most healthy adults are completely safe from the A-H1N1 influenza within 2 weeks of the vaccination. As long as the virus does not mutate into a new form, this vaccine will work to prevent that specific kind of flu for the life of the person vaccinated.

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14y ago

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