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Diphtheria-pertussis-tetanus vaccine: reactogenicity of commercial products
Insights
Most children experience moderate to severe reactions after diphtheria-pertussis-tetanus (DPT) vaccination, including fever and behavioral changes. These findings suggest a need to reevaluate current DPT vaccine formulations and their reactogenicity.
Area of Science:
- Pediatrics
- Immunology
- Vaccinology
Background:
- Diphtheria-pertussis-tetanus (DPT) vaccination is a standard pediatric immunization.
- Assessing vaccine reactogenicity is crucial for monitoring safety and efficacy.
- Understanding common DPT vaccine reactions in children informs parental guidance and clinical practice.
Purpose of the Study:
- To survey parental reports of children's reactions to DPT vaccine within 48 hours of immunization.
- To categorize and quantify the types and severity of DPT vaccine reactions.
- To evaluate the reactogenicity of DPT vaccines across the recommended immunization series and different manufacturers.
Main Methods:
- A survey was distributed to parents from four pediatric practices.
- Parents reported on their children's temperature, behavioral changes, and local reactions post-DPT immunization.
- Data from 1,232 returned questionnaires were analyzed to determine reaction rates.
Main Results:
- A high percentage of children (93%) experienced DPT vaccine reactions, with 7.1% reporting severe reactions.
- Over 50% of children had fevers (≥100 F), 80% exhibited behavioral changes, and 72.2% had local reactions.
- Reactogenicity was consistent across different DPT vaccine doses and manufacturers; control groups showed significantly fewer reactions.
Conclusions:
- Current DPT vaccines elicit frequent and often moderate to severe reactions in children.
- The observed reactogenicity rates necessitate a reevaluation of existing DPT vaccine formulations.
- Further research into DPT vaccine safety and alternative formulations is warranted.
Abstract:
Parents from four practices were surveyed to ascertain reactions of children to diphtheria-pertussis-tetanus (DPT) vaccine in the 48 hours after immunization. Vaccines were administered according to current recommendations. Responses were scored in three categories: temperature, behavioral changes, and local reactions. Questionnaires were returned by 1,232 (84.9%) patients. Only 7.0% reported no reaction, while 336 (27.3%) reported mild, 722 (58.6%) moderate, and 88 (7.1%) severe reactions. Over 50% experienced temperatures of at least 100 F, and 80% noted behavioral changes; 72.2% had local reactions. No encephalitis, seizures, or hospitalizations were reported. Reactogenicity was similar for the five immunizations of the recommended series and the two manufacturers evaluated. Reported reactions in the control group were significantly lower than in the study group. These reaction rates underline the need to reevaluate present DPT vaccines.