The poor showing is primarily because the vaccine doesn't include the bug that is making most people sick, health officials say. In the last decade, flu vaccines at their best were 50 to 60 percent effective.
Read more: http://www.kctv5.com/story/27860070/flu-vaccine-not-working-well-only-23-percent-effective#ixzz3P04NZ4Ho
Flu vaccine not working well; only 23 percent effective - KCTV5
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