HIV Pre-Exposure Prophylaxis Cascade Stages Among Men Who Have Sex With Men With Sexually Transmitted Infections in China: Multicenter Cross-Sectional Survey Study

MSM with STIs were engaged with the PrEP cascade stages at a relatively high rate, but they lacked an understanding of PrEP and underestimated HIV risk. The prevalence of having a basic understanding of PrEP was lower than PrEP usage, and this suboptimal awareness could impede PrEP efficacy and lead to risk compensation.