Persistence of Antibodies After Meningococcal Vaccine PF-06866681 in Healthy Children

A PHASE III, OPEN, MULTI-CENTRE, CONTROLLED STUDY TO EVALUATE THE LONG-TERM ANTIBODY PERSISTENCE AT 2, 3, 4, 5 AND 6 YEARS AFTER A BOOSTER DOSE OF MENINGOCOCCAL SEROGROUP A, C, W-135, Y- TETANUS TOXOID CONJUGATE VACCINE (MENACWY-TT) OR MENINGITEC (REGISTERED) ADMINISTERED IN HEALTHY 5-YEAR-OLD CHILDREN IN STUDY MENACWY-TT-048 EXT: 039 Y2, 3, 4, 5 (112036), WHO WERE PRIMED WITH THE SAME VACCINE IN STUDY MENACWY-TT-039 (109670) AT 12 THROUGH 23 MONTHS OF AGE.

The purpose of this study is to evaluate the long-term antibody persistence as well as safety of GSK Biologicals' MenACWY-TT vaccine versus Meningitec up to 6 years after booster vaccination administered in healthy 5 year old children in the study MENACWY-TT-048 EXT: 039 Y2, 3, 4, 5 (NCT00955682), who were primed with the same vaccine in the study MENACWY-TT-039 (NCT00474266) at 12 through 23 months of age.

The subjects in this study will be allocated to the same groups as in study MENACWY-TT-048 EXT: 039 Y2, 3, 4, 5 (NCT00955682). No vaccine will be administered during this long-term persistence study.

Inclusion Criteria:

All subjects must satisfy ALL the following criteria at study entry:

• Subjects' parent(s)/Legally Acceptable Representative(s) [LAR(s)] who, in the opinion of the investigator, can and will comply with the requirements of the protocol.
• A male or female who has received primary and booster vaccination with the MenACWY-TT or Meningitec vaccines in studies MENACWY-TT-039 (109670) and MENACWY-TT-048 EXT: 039 Y2, 3, 4, 5 (112036), respectively.
• Written informed consent obtained from the parent(s)/LAR(s) of the subject.
• Healthy subjects as established by medical history and clinical examination before entering into the study.

Exclusion Criteria:

The following criteria should be checked at the time of study entry. If ANY exclusion criterion applies, the subject must not be included in the study:

• Child in care.
• History of meningococcal disease.
• Administration of a meningococcal polysaccharide or a meningococcal polysaccharide conjugate vaccine outside of studies MENACWY-TT-039 (109670) and MENACWY-TT-048 EXT: 039 Y2, 3, 4, 5 (112036).
• Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination.
• Bleeding disorders, such as thrombocytopenia, or subjects on anti-coagulant therapy.