Comparison of GSK Biologicals' Reduced Antigen Diphtheria and Tetanus Toxoids and Acellular Pertussis- Inactivated Poliovirus Vaccine, to BoostrixTM and Inactivated Poliovirus Vaccine Administered Separately and With Revaxis®

Inclusion Criteria: * A male or female subjects aged 15 years and over (Germany), or 18 years and over (France) at the time of the vaccination. * Written informed consent obtained. * Free of obvious health problems Having received primary vaccination with diphtheria and tetanus vaccines to the best of his/her knowledge. * Female subjects must not be pregnant or lactating. Exclusion Criteria: * Use of any investigational or non-registered drug or vaccine other than the study vaccine(s) within 30 days preceding the administration of the study vaccine dose, or planned use during the study period. * History of previous or intercurrent diphtheria or tetanus, pertussis or polio disease in the last 10 years. * French subjects: history of diphtheria or tetanus, pertussis or polio vaccination in the last 10 years. * German subjects: history of diphtheria or tetanus, pertussis or polio vaccination in the last 5 years, except those subjects participating in the tetanus antibody kinetic subgroup. * German subjects participating in the tetanus antibody kinetic subgroup: history of diphtheria or tetanus, pertussis or polio vaccination in the last 10 years. * Administration or planned administration of a vaccine not foreseen by the study protocol during the period starting 30 days before the administration of the study vaccine dose and ending 30 days after study vaccination. * Chronic administration or planned administration of immuno-suppressants or other immune-modifying drugs within six months or 5 half-lives (whichever is the longer) of vaccination. * Administration of immunoglobulins and/or any blood products within the three months preceding the study vaccination or planned administration during the study period. * Any confirmed or suspected immunosuppressive or immunodeficient condition, * History of seizures or progressive neurological disease. * Major congenital defects or serious chronic illness. * Acute disease at the time of enrolment. * History of allergic disease or reactions likely to be exacerbated by any component of the vaccine(s). * The following adverse experiences associated with diphtheria-tetanus-pertussis vaccination constitute absolute contraindications to further administration of diphtheria-tetanus-pertussis vaccine; if any of these adverse experiences occurred following previous vaccinations, the subject should not be included: Absolute contraindications: * Hypersensitivity reaction due to the vaccine. * Encephalopathy Precautions: * Fever \>= 40.0°C within 48 hours of vaccination not due to another identifiable cause. * Collapse or shock-like state within 48 hours of vaccination. * Persistent, inconsolable crying lasting \>= 3 hours occurring within 48 hours of vaccination. * Seizures with or without fever occurring within 3 days of vaccination.