Why do we have to get a flu shot every year?

Subject: Why do we have to get a flu shot every year?

Date: Fri Nov 5 15:11:34 1999
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Area of science: Medicine
ID: 941832694.Me

Message:


Why can't we get a lifetime vaccination against flu like we do
against polio and measles?  When do you predict that a lifetime
flu shot will be available?

Re: Why do we have to get a flu shot every year?

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