- Old and New World arenaviruses share a highly conserved epitope in the fusion domain of the glycoprotein 2, which is recognized by Lassa virus-specific human CD4+ T-cell clones. Meulen, J., Badusche, M., Satoguina, J., Strecker, T., Lenz, O., Loeliger, C., Sakho, M., Koulemou, K., Koivogui, L., Hoerauf, A. Virology (2004)