Retrospective Survey of Safety of Fourth Dose Pentacel® in Children

Number of Participants Who Had Positive Response to the Solicited Adverse Events Questionnaire Post 4th Dose of the Pentacel® Vaccination Series

Positive response is a 'Yes' to any of the following questions: 1. Has your child been admitted to a hospital? 2. Has your child experienced an illness that made you fear for his/her life (life-threatening episode) that required attendance to the Emergency Room or a Physician's office? 3. Has your child developed a medical condition that required 3 or more office or emergency room visits for that condition? 4. Has your child been diagnosed by a physician as having: Low blood count or low platelet count? Swelling or redness of the joints? Asthma? Diabetes? Autism?

Time frame: 6 months post 4th dose vaccination

Number of Participants Reporting Serious Adverse Events (SAE) Post 4th Dose of the Pentacel® Vaccination Series and Relationship to Study Vaccine.

SAE: any untoward medical occurrence with the following outcomes: * death, * a life-threatening adverse drug experience (as confirmed by the investigators), * inpatient hospitalization or prolongation of existing hospitalization, * a persistent or significant disability/incapacity, or * a congenital anomaly/birth defect. Medical conditions that required 3 or more office or emergency room visits, and diagnosis by a physician of low blood cell count or low platelet count, swelling or redness of the joints, asthma, diabetes, or autism were also solicited. (MedDRA Version 6.0)

Time frame: 6 Months post 4th dose vaccination