期刊
HUMAN VACCINES
卷 3, 期 2, 页码 59-63出版社
LANDES BIOSCIENCE
DOI: 10.4161/hv.3.2.3878
关键词
vaccine safety; convulsions; ITP; purpura; meningococcal group C conjugate vaccine
Passive surveillance reports of adverse events following meningococcal group C conjugate vaccine (MCCV) in the United Kingdom suggested a possible increased risk of convulsions and purpura. To investigate this further, hospital admissions for convulsions and purpura were obtained for the period November 1999 to September 2003 in children from the South East of England and these were linked to vaccine records for MCCV, Diphtheria/Tetanus/Pertussis vaccine (DTP) and Measles/Mumps/Rubella vaccine (MMR). A total of 1,715 children with convulsions and 363 with purpura were successfully linked to vaccination records. The self-controlled case-series method was then used to investigate whether there was any epidemiological evidence of an increased risk of convulsions or purpura following vaccination. The results showed that there was no evidence of an increased relative incidence (RI) of convulsions in the two weeks following MCCV with RI estimates (95% confidence intervals) of 0.57 (0.36-0.86), 1.03 (0.62-1.69) and 0.81 (0.51-1.30) for children aged < 1, 1, 2-17 years respectively. There was also no increased relative incidence of purpura in the 4 weeks following MCCV, with an overall RI of 1.15 (0.80-1.67). There was evidence of an increased risk of convulsions and idiopathic thrombocytopenic purpura following MMR vaccination as previously documented.
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