hiv positive known immunodeficiency virus human infection patients cd aids hepatitis virus immunodeficiency hiv human infection known active hcv hbv immunodeficiency hiv virus human known positive infection history antibodies acquired hepatitis active infection known chronic hiv history positive viral patients history primary immunodeficiency disease prior known hypertensive pancreatitis leptomeningeal patients antiretroviral combination hiv immunodeficiency positive ineligible virus human therapy patients