Vaccination Study of Abatacept (BMS-188667) for Normal Healthy Volunteers

Inclusion Criteria: * Healthy Subjects * Body Weight between 60 and 100 kg. * Males and Females must be using adequate contraceptive methods during study and for 10 weeks after dose of study mediciation. Exclusion Criteria: * Females who are prgnant or breastfeeding * History of autoimmune disorder, immunodeficiency, or infection within past 3 months. * Active TB requiring treatment within the previous 3 years. * Positive breast cancer screen, PPD test. * Vaccination with tetanus or pneumococcal vaccine within 5 years. * Vaccination with any live vaccine within 4 weeks. * History of drug or alcohol abuse. * Any significant allergy.