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Flu Vaccine Increases Bell's Palsy

After the introduction of an inactivated nasal flu vaccine that was used in Switzerland during the 2000 to 2001 flu season, 46 cases of Bell's palsy, a neurological disorder characterized by facial paralysis, were reported. This prompted the study in which researchers found that this particular flu vaccine greatly increased the risk of Bell's palsy. The risk of getting the disease was 19 times higher among those who had received the vaccine, compared to controls. Fortunately, this vaccine is no longer in clinical use, but that doesn't do much to help those already affected.

New England Journal of Medicine February 26, 2004;350(9):896-903

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