At the other end of the scale, the estimated number of undiagnosed HIV-infected MSM with a CD4 count of less than 350 cells per μL (and thus, in principle, eligible for treatment) remains unchanged from 1490 (95% CrI 1410–1570) at the start of 2001, to 1490 (1240–1770) at the end of 2010, although this change does represent a decrease from a peak in 2007 of 1790 (1700–1880) undiagnosed infections. The gene discussed is CD4; the disease is infection.