- Known history of human immunodeficiency virus (HIV) or active with hepatitis C virus (HCV) or hepatitis B virus (HBV); subjects who are positive for hepatitis B core antibody or hepatitis B surface antigen must have a negative polymerase chain reaction (PCR) result before enrollment; those who are PCR positive will be excluded; subjects who have an undetectable human immunodeficiency virus (HIV) viral load with CD4 >= 200 and are on highly active antiretroviral therapy (HAART) medication are allowed