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No flu vaccine link to Guillain-Barré syndrome found

Massive study in China shows no connection between 2009 H1N1 immunization and rare nervous system disorder

By Nathan Seppa

- More than 2 years ago

Any speculation drawing an ongoing link between flu vaccination and the risk of a rare, paralyzing neuromuscular disorder has been dashed by a huge study. An analysis of side effects recorded among nearly 90 million people in China who were vaccinated during the 2009–2010 flu season found that only 11 people subsequently were diagnosed with Guillain-Barré syndrome, a rate no greater than what normally appears in the population.