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Flu Shot Breakthrough on the Horizon

Scientists are one step closer to a universal vaccine that protects against all flu strains.
01:47 | 09/23/2013

Transcript for Flu Shot Breakthrough on the Horizon

And in medical news tonight big changes in the flu shot we get every year. This season for som people, the dose could be more powerful than before and scientists are reporting progress has been made... See More
This transcript has been automatically generated and may not be 100% accurate.
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