- Adoptive transfer of simian immunodeficiency virus (SIV) naïve autologous CD4(+) cells to macaques chronically infected with SIV is sufficient to induce long-term nonprogressor status. Villinger, F., Brice, G.T., Mayne, A.E., Bostik, P., Mori, K., June, C.H., Ansari, A.A. Blood (2002)