Additionally, elevated levels of IgA (Taylor et al., 1986; Rozenbaum et al., 1990; Spano et al., 2000) and IgG (Taylor et al., 1986; Spano et al., 2000) are associated with poor prognosis and KS disease progression, as well as with KS regression upon immune restoration with HAART (Mbopi-Keou et al., 2004). This evidence concerns the gene CD79A and Kaposi's sarcoma.