MedImmune recalling swine flu vaccine-FDA

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" The company is the second to recall H1N1 swine flu vaccine in the past month. Sanofi-Aventis SA (SASY.PA) (SNY.N) on Dec. 15 recalled 800,000 doses of its pediatric H1N1 swine flu vaccine because it is not as potent as it should be.

MedImmune said in a statement the recall involves unused doses of 13 specific lots of 2009 H1N1 nasal spray vaccine, because of a slight decrease in potency that was detected during regular checks."