Progress in research on the effect of AIDS prevention services on high risk behaviors for HIV infection in men who have sex with men.

Men who have sex with men (MSM) represent a key population in the prevention and control of HIV/AIDS. Despite the remarkable advancements in AIDS prevention and treatment, the HIV infection prevalence and incidence in MSM with high risk behaviors remain higher. In recent years, the utilization of novel AIDS prevention services, such as HIV self-testing, pre-exposure prophylaxis and post-exposure prophylaxis (PrEP/PEP) in MSM gradually increased. However, the promotion of these services still faces dual challenges: insufficient support from the health system and low individual acceptance. HIV prevention services can not only provide direct biomedical protection for MSM but also reshape their behavior patterns by influencing their risk perception. These services have dual impacts on MSM's behaviors. On one hand, they might lead to an increase in high risk behaviors. On the other hand, these services improve MSM's health awareness and reduce high risk behaviors. This paper summarizes the epidemiology of HIV/AIDS and related high risk behaviors in MSM, with a focus on the utilization of HIV self-testing,PrEP/PEP, as well as their impact on high risk behaviors of MSM for the further promotion of HIV prevention services and improvement of intervention strategies.