Comparison of Immuno, Reacto and Safety of Recombinant Hepatitis B Vaccine With or Without MPL in Healthy Older Adults

Inclusion Criteria:

• Healthy male or female subjects between 50 and 70 years old.
• Written informed consent will have been obtained from the subjects.
• Good physical condition as established by physical examination and history taking at the time of entry

Exclusion Criteria:

• Positive titres for anti hepatitis antibodies
• Any vaccination against hepatitis B in the past.
• Any previous administration of MPL
• Elevated serum liver enzymes at two subsequent determinations 14 days apart.
• History of significant and persisting hematologic, hepatic, renal, cardiac or respiratory disease.
• Axillary temperature > 37.5°C at the time of injection.
• Any acute disease at the moment of entry.
• Chronic alcohol consumption.
• Any treatment with immunosuppressive or immunostimulant therapy.
• Any chronic drug treatment, which in the investigator's opinion, precludes inclusion into the study.
• History of allergic disease likely to be stimulated by any component of the vaccine.
• Administration of any other vaccine(s) or any immunoglobulin during the study period.
• Simultaneous participation in any other clinical trial.