- African origin of human T-lymphotropic virus type 2 (HTLV-2) supported by a potential new HTLV-2d subtype in Congolese Bambuti Efe Pygmies. Vandamme, A.M., Salemi, M., Van Brussel, M., Liu, H.F., Van Laethem, K., Van Ranst, M., Michels, L., Desmyter, J., Goubau, P. J. Virol. (1998)