Risk of Guillain‐Barré Syndrome following Serogroup C Meningococcal Conjugate Vaccine in Quebec, Canada

Abstract
To assess the risk of Guillain-Barré syndrome (GBS) following administration of meningococcal serogroup C-CRM197 conjugate vaccine, provincial immunization records were linked with hospital discharge records, and medical charts were reviewed. In the cohort of 1.9 million individuals (age, 2 months to 20 years), observed postvaccination frequencies of GBS were not higher than expected.