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AtheistCrusader

(33,982 posts)
5. The flu shot is only as good as the immune system behind it.
Fri Feb 22, 2013, 11:18 AM
Feb 2013

The shot just gives your immune system a key to identify certain strains of the flu. If it is not up to the task, the flu will overwhelm it, even if the various components of your immune system know what to look for.

It has no protective properties beyond that.

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