Flu vaccine: Does it work?

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Flu vaccine: Does it work?

Flu vaccine: Does it work?
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Flu vaccine: Does it work?

by CBSTV Videos 2:57 mins

The centers for disease control will release new information on the effectiveness of the year's flu vaccine. Vanderbilt University's Dr. William Schaffner speaks to the "CBS This Morning" co-hosts about the vaccine.

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