Keyword: FluLaval

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GSK yanks all doses of quadrivalent flu jab for potency problems

This past season's flu vaccines posted one of the worst efficacy rates in recent memory. That's partly because the viral strains they contained weren't the ones that ended up circulating. But on top of that, GlaxoSmithKline has uncovered some other effectiveness problems of its own--and now it's recalling a quadrivalent jab in a move that affects 1.7 million doses.