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In U.S., Flu Vaccine Worked in Just over Half of Those Who Got It

Posted Feb 21 2013 5:50pm

A U.S. government analysis of this season's flu vaccine suggests it was effective in only 56 percent of people who got the shot, and it largely failed to protect the elderly against an especially deadly strain circulating during flu season.

Vaccination containers pass through a machine that will individually photograph vaccines for quality control on the assembly line at the Novartis flu vaccine manufacturing facility in Holly Springs, North Carolina, November 24, 2009. REUTERS/Jason Arthurs

Source: Reuters Health
Related MedlinePlus Pages: Flu , Immunization
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