Conditions and Diseases
Vaccinations
Swine Flu (H1N1/09)
Immune System

Does the H1N1 vaccine provide lifetime immunity?

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Wiki User
2012-01-15 21:21:59

There are studies that suggest that over time the flu vaccines

can lose some effectiveness. This is partially due to the original

vaccine being less effective on mutated forms of the same virus.

But for the same exact strain of H1N1 that is in the vaccine, and

others that are very similar to it, many people do retain lifetime

protection.

One of the ways new viruses are created is through mutation of

existing viruses. If the H1N1/09 Pandemic Swine Flu virus mutates

to a strain that our immune systems do not detect as the same, then

the body would have to either be vaccinated with a new vaccine that

includes the new strain, or develop new immunity naturally by

infection.


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