Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B virus vaccine are eligible Known to be seropositive for human immunodeficiency virus (HIV), hepatitis C virus (HCV), or hepatitis B virus (HBV) Known seropositive for human immunodeficiency (HIV) virus, hepatitis B surface antigen (HbsAg), or antibody to hepatitis C virus (anti-HCV) Known seropositive for or positive viral load for human immunodeficiency virus (HIV) or positive viral loads for infectious hepatitis, type B (HBV) or C (HCV) Subject is seropositive for or has active viral infection with hepatitis B virus (HBV): Subject is known to be seropositive for, or have an active infection with, hepatitis C virus (HCV). Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B virus vaccine are eligible; patients 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 Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B virus vaccine are eligible Human immunodeficiency virus (HIV)/hepatitis B virus (HBV)/hepatitis C virus (HCV) infection:\r\n* Seropositive for HIV antibody\r\n* Seropositive for hepatitis C or positive for hepatitis B surface antigen (HbsAG) Known seropositive and requiring anti-viral therapy for human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV) defined by polymerase chain reaction (PCR) Known active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of prior hepatitis B virus vaccination are eligible Known seropositive for or active viral infection with, human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV) Human immunodeficiency virus (HIV)/hepatitis B virus (HBV)/hepatitis C positive (HCV) infection:\r\n* Seropositive for HIV antibody; (patients with HIV are at increased risk of lethal infections when treated with marrow-suppressive therapy; appropriate studies will be undertaken in patients receiving combination antiretroviral therapy in the future should study results indicate effectiveness) \r\n* Seropositive for hepatitis C or positive for hepatitis B surface antigen (HbsAG) Subject with known history of human immunodeficiency virus (HIV) or if known seropositive for hepatitis C virus (HCV) or hepatitis B virus (HBV); HIV-positive patients on combination antiretroviral therapy are ineligible\r\n* NOTE: Patients seropositive for hepatitis B or C may be included if confirmed hepatitis C recombinant immunoblot assay (RIBA) negative or HCV ribonucleic acid (RNA) negative (qualitative) Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); subjects who are seropositive because of hepatitis B virus vaccine are eligible Active hepatitis B (hepatitis B virus [HBV]) or C (hepatitis C virus [HCV]) infection (negative serology required excluding those with are seropositive due to prior vaccination) and/or known history of human immunodeficiency virus (HIV) Known seropositivity for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV), or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B vaccine are eligible Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B virus vaccine are eligible Known seropositive and requiring anti-viral therapy for human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV) Human immunodeficiency virus (HIV)/hepatitis B virus (HBV)/hepatitis C virus (HCV) infection: \r\n* Seropositive for HIV antibody \r\n* Seropositive for hepatitis C or positive for hepatitis B surface antigen (HbsAG) Known seropositive for, or history of, active Human Immunodeficiency Virus (HIV) Hepatitis B Virus (HBV), Hepatitis C Virus (HCV) Active autoimmune disease; other CNS autoimmune disease. Known seropositive for human immunodeficiency (HIV) virus, hepatitis B surface antigen (HbsAg), or antibody to hepatitis C virus (anti-HCV) with confirmatory testing and requiring anti-viral therapy. Seropositive for human immunodeficiency virus, hepatitis B, or hepatitis C Known seropositive for human immunodeficiency (HIV) virus, hepatitis B surface antigen (HbsAg), or antibody to hepatitis C virus (anti-HCV). Seropositive for or active viral infection with hepatitis B virus (HBV): Known seropositive for or active infection with hepatitis C virus (HCV) Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B vaccine are eligible Known active hepatitis, type A, B or C; patients who are seropositive because of hepatitis B virus vaccine are eligible Seropositive for human immunodeficiency virus (HIV), hepatitis B (HBV) or hepatitis C (HCV) per patient history Known seropositive for or active viral infection with hepatitis B virus (HBV) or/and human immunodeficiency virus (HIV). Seropositive or active viral infection with hepatitis B virus, human immunodeficiency virus or hepatitis C virus. Known seropositivity for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV), or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B virus vaccine are eligible Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B virus vaccine are eligible Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive ( i.e. hepatitis B core antibody positive; quantitative deoxyribonucleic acid [DNA] negative) are eligible with appropriate prophylaxis Known seropositive for or active human immunodeficiency virus (HIV) infection or hepatitis B or C viral infection; patients who are seropositive because of hepatitis B virus vaccine are eligible Known seropositive and requiring anti-viral therapy for human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV) Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B virus vaccine are eligible; patients 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 Known seropositive for human immunodeficiency virus (HIV) or hepatitis C virus (HCV). Known seropositivity for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV), or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B virus vaccine are eligible; patients who are seropositive for HCV, but have a negative viral load are also eligible; documentation that the patients have completed a course of therapy for HCV is required and will be obtained Known seropositive and requiring anti-viral therapy for human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV) Individuals seropositive for hepatitis B or C are ineligible Known seropositive for or active viral infection with hepatitis B virus (HBV), hepatitis C virus (HCV), human immunodeficiency virus (HIV) Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV). Patients who are seropositive because of hepatitis B virus vaccine are eligible. Known seropositive for an active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV). Patients who are seropositive because of hepatitis B virus vaccine are eligible. Seropositive for human immunodeficiency virus (HIV), hepatitis B (HBV) or hepatitis C (HCV) per patient history Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of hepatitis b virus vaccine are eligible Subjects who are seropositive because of hepatitis B virus vaccine Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B virus vaccine are eligible Seropositive for human immunodeficiency virus (HIV) or hepatitis C virus (HCV). Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B virus vaccine are eligible Known seropositive for human immunodeficiency virus (HIV) or hepatitis C virus (HCV). Known history of human immunodeficiency virus (HIV) or seropositive test for hepatitis C virus or hepatitis B virus Seropositive for human immunodeficiency virus (HIV) or hepatitis C virus (HCV). Known seropositive, requiring anti-viral therapy, and with detectable viral load by polymerase chain reaction (PCR) for human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV) Known seropositive for or active viral infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV); patients who are seropositive because of hepatitis B virus vaccine are eligible Known seropositive for human immunodeficiency (HIV) virus, hepatitis B surface antigen (HbsAg), or antibody to hepatitis C virus (anti-HCV).