We identified neurological admissions temporally associated with influenza vaccine to determine the likelihood of causality using World Health Organization (WHO) criteria. Although all cases were categorized as possibly related to the vaccine, most had a compelling alternative explanation. This observation suggests that the current WHO criteria may not be sufficient in determining if an adverse event is truly vaccine related.

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http://dx.doi.org/10.1080/00365540701793709DOI Listing

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