Evaluation of Safety, Immune-Response and Efficacy of GSK Biologicals' EBV (Epstein Barr Virus) Vaccine (268664).

Inclusion Criteria:

* Healthy adolescent/adult subjects between and including 16 and 25 years of age at the time of screening.

  * Written informed consent obtained from the subject prior to enrolment.
  * Seronegative for EBV antibody.

Exclusion Criteria:

* Administration of immunoglobulin and/or any blood products within the three months (90 days) preceding the first dose of study vaccine or planned administration during the study period.

  * Use of any investigational or non-registered 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.
  * Any confirmed or suspected immunosuppressive or immunodeficient condition, including human immunodeficiency virus (HIV) infection.
  * Family history of congenital or hereditary immunodeficiency.
  * Major congenital defects or serious chronic illness.
  * History of any neurologic disorders or seizures, with the exception of a single febrile seizure during childhood.
  * Acute or chronic, clinically significant pulmonary, cardiovascular, hepatic or renal functional abnormality, as determined by physical examination or laboratory screening tests.
  * History of intravenous drug abuse within the past 2 years.
  * Known or suspected allergy to any vaccine component.