Figure 1.

Viral load categories for participants of the SHCS in Switzerland. Adapted from Ledergerber et al, presented at CROI 2010 (with permission). Viral load categories: Stably suppressed: Three consecutive HIV-1 RNA values below detection limit (<50 copies/mL). Improving: A detectable followed by two undetectable values. Unstable: a) Detectable - undetectable - detectable; or b) Undetectable - detectable - undetectable. Failing: An undetectable followed by two detectable values. Stable failure: Three consecutive detectable viral load values