Non-Inferiority of Meningococcal Vaccine GSK134612 Versus Mencevax™ in 11-17 Year-Old Subjects

Inclusion Criteria:

• Subjects who the investigator believes that they and/or their parents/guardians can and will comply with the requirements of the protocol.
• A male or female between, and including, 11 and 17 years of age at the time of the vaccination.
• Written informed assent/consent obtained from the subject/ from the parent or guardian of the subject.
• Healthy subjects as established by medical history and clinical examination before entering into the study.
• Previously completed routine childhood vaccinations to the best of the subject's/the subject's parent's/guardian's knowledge.
• If the subject is female, she must be of non-childbearing potential, or if she is of childbearing potential, she must practice adequate contraception for 30 days prior to vaccination, have a negative pregnancy test and continue such precautions for two months after vaccination.

Exclusion Criteria:

• Use of any investigational or non-registered product (drug or vaccine) other than the study vaccine(s) within 30 days preceding the first dose of study vaccine, or planned use during the study period.
• Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs within six months prior to the first vaccine dose.
• Planned administration/ administration of a vaccine not foreseen by the study protocol within one month of the dose of vaccine.
• Previous vaccination with meningococcal polysaccharide vaccine of serogroup A, C, W-135 and/or Y within the last five years.
• Previous vaccination with meningococcal polysaccharide conjugate vaccine of serogroup A, C, W-135 and/or Y.
• Previous vaccination with tetanus toxoid within the last month.
• History of meningococcal disease.
• Any confirmed or suspected immunosuppressive or immunodeficient condition (congenital or secondary), including human immunodeficiency virus (HIV) infection, based on medical history and physical examination.
• A family history of congenital or hereditary immunodeficiency, until the immune competence of the potential vaccine recipient is demonstrated.
• History of reactions or allergic disease likely to be exacerbated by any component of the vaccine(s).
• Major congenital defects or serious chronic illness.
• Acute disease at the time of enrolment.
• Administration of immunoglobulins and/or any blood products within the three months preceding the dose of study vaccine or planned administration during the study period.
• Pregnant or lactating female.
• History of chronic alcohol consumption and/or drug abuse.
• Female planning to become pregnant or planning to discontinue contraceptive precautions.