INCLUSION CRITERIA:

• Written informed consent
• Healthy PPD-negative volunteers aged 18 to 45 years
• No evidence of pulmonary pathology (i.e. acute or chronic pulmonary disease; past TB infection/disease) as confirmed by chest X-ray.
• Seronegative for HIV 1 and 2, HBsAg, and HCV
• Clinically normal laboratory values for creatinine, alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bilirubin, complete blood count (CBC) and differential, haemoglobin, platelet count and urinalysis.
• Females : Non pregnant, must use adequate contraceptive precautions for 30 days prior to vaccination, have a negative pregnancy test and must agree to continue such precautions for two months after completion of the vaccination series.

EXCLUSION CRITERIA:

• Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs within 6 months prior to the first vaccine dose.
• History of prior Bacillus Calmette-Guérin (BCG) vaccination.
• History of documented exposure to Mycobacterium tuberculosis
• History of prior vaccination with experimental Mycobacterium Tuberculosis vaccines or experimental products containing MPL or QS21.
• Any confirmed or suspected immunosuppressive or immunodeficient condition; or family history of congenital or hereditary immunodeficiency.
• History of hypersensitivity to vaccines or vaccine components
• History of any acute or chronic illness or medication that, in the opinion of the investigator, may interfere with the evaluation of the safety or immunogenicity of the vaccine"