Moreover, in terms of the risk factors correlated with postoperative infection in HIV positive patients, Abalo suggested that they were associated with HIV clinical category B, CD4+ T-lymphocyte category of ≥2, and contaminated wounds.1 Li advocated that multi-factors including age, constitutional index, operation time, wound contamination and emergency operation were correlated to the postoperative infection.3 Up to now, there are different viewpoints in this regard. Here, CD4 is linked to infection.