A durable response for at least one year was documented in a trial (INCAS) for the triple therapy arm with VIRAMUNE, zidovudine and didanosine compared to zidovudine + didanosine or VIRAMUNE + zidovudine in 151 HIV-1 infected, treatment naive patients with CD4+ cell counts of 200- 600 cells/ mm3 (mean 376 cells/ mm3) and a mean baseline plasma HIV-1 RNA concentration of 4.41 log10 copies/ ml (25,704 copies/ ml).