Study to Evaluate Meningococcal Serogroups A,C,W-135,Y Conjugate Vaccine When Given as 1 Dose to Healthy Subjects Aged 18-25 Years

Inclusion criteria: * Healthy male or female between, and including, 18 and 25 years of age at the time of vaccination. * Written informed consent obtained. * Subject with previously completed routine childhood vaccinations to the best of his/her knowledge. * Female subjects should be of non-childbearing potential, or abstinent, or using an adequate contraception. Exclusion criteria: * Previous vaccination against OR history of OR exposure within previous 12 months to, meningococcal serogroup A, C, W-135 or Y disease. * Administration of a tetanus vaccine within 6 months before study vaccination. * Any confirmed or suspected immunosuppressive or immunodeficient condition, including human immunodeficiency virus (HIV) infection. * A family history of congenital or hereditary immunodeficiency. * History of any neurologic disorders or seizures. * Use of any investigational or non-registered product (drug or vaccine) other than the study vaccine within 30 days preceding the first dose of study vaccine, or planned use during the study period. * History of chronic alcohol consumption and/or drug abuse