Leukapheresis to Obtain Plasma or Lymphocytes for Studies of HIV-infected Patients, Including Long-term Non-progressors

This study will collect white blood cells and plasma for research on how the immune system controls HIV infection. The immune system of a very small group of people with HIV, called non-progressors, has been able to control HIV for long periods without antiretroviral therapy. Some immune system-related genes important for this control have been identified in these patients. People living with HIV who are 18 years of age and older, documented or suspected long-term nonprogressors in generally good health may be eligible to screen for the study. Participants will undergo apheresis (a method for collecting larger quantities of certain blood components than can safely be collected through a simple blood draw) if venous access is adequate once yearly. Some may be asked to return every six months. * Automated apheresis - Blood is drawn through a needle placed in an arm vein and spun in a machine, separating the blood components. The white cells are extracted and the red cells, with or without plasma (liquid part of the blood), are re-infused into the donor through a needle in the other arm. An anticoagulant (medication to prevent blood from clotting) is usually added to the blood while in the machine to prevent it from clotting during processing. * Blood draw - a needle placed in an arm vein for large volume (approx 75ml) blood draw if veins considered inadequate for apheresis procedure. Some of the blood collected through apheresis may be stored for future studies of HIV disease and immune function and for HLA testing, a genetic test of markers of the immune system. ...

* INCLUSION CRITERIA: 1. Adult (18 years-old or older) 2. Eligibility to undergo apheresis procedures; or, for participants who are unable to undergo apheresis, willingness to undergo blood draw for research purposes that remain within safety guidelines established by NIH policy. 3. Willingness to give informed consent for the storage of blood or tissue samples and HLA testing AND at least one of the following: * An HIV-seropositive participant categorized as an LTNP as defined by clinical and laboratory criteria, regardless of HLA class I type. * HIV-seropositive progressors * Persons who are seronegative for HIV but are family members of seropositive participants exhibiting immunologic control of HIV EXCLUSION CRITERIA: 1. Pregnant 2. Cardiovascular instability, severe anemia, inadequate venous access, severe coagulation disorder, or any other condition that the Principal Investigator or Apheresis Unit staff considers a contraindication to the apheresis procedure or research blood draw. 3. Any condition that, in the opinion of the investigator, contraindicates participation in this study.