Signatures of neurological adverse events after vaccination
There have been reports associated with the development of neurological adverse events (AEs) post-vaccination. Here, we retrospectively examine the Vaccine Adverse Events Reporting System (VAERS) database for neurological AEs reported following vaccination. Since VAERS is a passive reporting system, to minimize reporting bias and to reduce background events, this retrospective study examines both age-stratified AE reports made with onset within 24 h of immunization, and age-stratified AE reports regardless of timeframe from immunization. Immediate temporal onset data patterns for febrile convulsion, seizure, and syncope AEs were observed for multiple vaccines. For age-stratified AEs in infants up to 3 years of age, the following patterns of high association were observed: (i) Aphasia, autism spectrum disorder, and speech disorder were found to be highly associated with the measles, mumps, and rubella and hepatitis B (HepB) vaccines; (ii) febrile convulsion and syncope were found to be highly associated with the meningococcal group B vaccine; and (iii) seizures were found to be highly associated with diphtheria and tetanus toxoids and whole-cell pertussis (DTP) vaccines.
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