Three findings may not argue in favor of selection for ICU admission, however: the number of admitted patients increases over time; the time since HIV diagnosis, CD4 cell rate, viral load and opportunistic infections were not different across the four time periods, indicating that we probably have not selected patients based on HIV data; and our incentive to admit patients earlier clearly shows that, rather than denying ICU admission, we may be in favor of opening the ICU doors to HIV patients. This evidence concerns the gene CD4 and Opportunistic infection.