HUFFINGTON POST
08/31/2015 07:39 am ET

We May Soon Have A Lifelong, One-Shot Flu Vaccine

The battle with flu is a seasonal struggle, and one we don’t always win.

The effectiveness of flu vaccines vary tremendously from year to year, and the reason is simple. There are three major types of the influenza virus (A, B and C) that, depending on the sprinkling of proteins decorating their surface, can be further subdivided into many different strains and lineages.

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