Peer-reviewed article
DTaP-induced infantile epileptic spasms syndrome high-risk window: Insights from school-age children.
Qi Zhang, Wen He, Meng-Na Zhang, Lin-Yan Hu, Xiu-Yu Shi et al. ·
Summary
Written by AI, not yet AICS's view · claude-haiku-4-5-20251001This study examined whether the DTaP vaccine can trigger infantile epileptic spasms in infants with underlying susceptibility to seizures. Researchers followed 564 children with seizures into school age and found that the DTaP primary series (first three doses) significantly increased the risk of seizures starting within 72 hours, but only in infants already prone to epilepsy. The booster dose and other vaccines did not show this association. Despite the vaccine timing seizures, long-term outcomes like death rates and school placement were the same regardless of when seizures began.
Key points
- DTaP primary series (Doses 1-3) is a significant independent precipitant for seizure onset within 72 hours (OR 4.00-4.67), but DTaP booster (Dose 4) shows no increased risk
- 9.4% of children with infantile epileptic spasms had seizure onset within 72 hours of DTaP vaccination
- The vaccine precipitated disease onset in infants with underlying epileptogenic susceptibility, not caused the underlying condition
- No differences in mortality, seizure remission, or educational placement between those with vaccine-proximate versus distant seizure onset
- Authors recommend a stratified approach: continue non-DTaP vaccines on schedule while considering delaying DTaP for high-risk infants
Limitations
The study cannot determine which infants have underlying epileptogenic susceptibility before vaccination, making it difficult to implement the recommended stratified approach in practice. The retrospective design and lack of specific information on how 'high-risk' infants would be identified limit the applicability of the recommendations.
Abstract
To determine the specific high-risk characteristics and temporal window associated with Diphtheria, Tetanus, and acellular Pertussis (DTaP) vaccine-precipitated infantile epileptic spasms syndrome (IESS), providing evidence for optimizing vaccination safety strategies, we conducted a multicenter retrospective cohort study of 564 patients with long-term follow-up (6.5-10.5 y). Patients were stratified by seizure onset interval into Vaccination-proximate (≤72 hours) and distant (>72 hours) groups. The proximate group (n = 53, 9.4%) exhibited a significantly younger age distribution (median [IQR]: 5.0 [3.0-6.0] vs. 5.0 [4.0-7.0] months, p = .04) and higher DTaP exposure (71.7% vs. 51.3%). Multivariable logistic regression in an etiologically analytic cohort (n = 541) identified the DTaP primary series as a significant independent precipitant for rapid onset (Dose 1: OR = 4.00; Doses 2 & 3: OR = 4.67) compared to other inactivated vaccines. Crucially, no increased risk was observed for the DTaP booster (Dose 4) or non-DTaP inactivated vaccines. Kaplan-Meier analysis confirmed a steep rise in seizure incidence within 72 hours post-primary DTaP. Long-term follow-up revealed no significant differences in all-cause mortality, seizure remission, or educational placement (p > .05) between groups, indicating that vaccination merely precipitated disease onset without altering the etiology-determined prognosis. This study, based on the full-course observation of school-aged children, is the first to validate the specificity of the DTaP-IESS association. The DTaP primary series is a critical precipitating factor for rapid onset (≤72 hours) in infants with underlying epileptogenic susceptibility. We recommend a stratified immunization strategy for high-risk infants: adhering to schedules for non-DTaP vaccines while adopting a prudent "delay-but-not-refuse" approach for DTaP to balance neurological safety with herd immunity.
Findings the Hub has extracted
Each claim below is labelled by its type of design and links back to this report.
- Intervention
- Stratified immunization strategy: standard DTaP vaccination schedule for general population versus delayed DTaP for high-risk infants
- Population
- 564 children with infantile epileptic spasms followed from infancy (median onset 5 months) into school age (6.5-10.5 year follow-up)
Key finding
DTaP primary series doses significantly increased risk of seizure onset within 72 hours (OR 4.00-4.67) compared to other inactivated vaccines
Zhang et al. · PubMed (US National Library of Medicine) · 28 Mar 2026