A Multicenter Prospective Clinical Cohort Study on the Pathogen Spectrum of HIV/AIDS Complicated With Infection

The goal of this observational study is to determine the incidence and spectrum of opportunistic infections among Chinese HIV/AIDS patients at this stage, to find intervention targets, to construct an early warning prediction model, and to give an individualized program with integrated immune function to obtain salvage opportunities for patients.The main questions it aims to answer are: * Describe the populations and characteristics of pathogenic microorganisms involved in HIV co-infection, map the spatial and temporal changes in the infection system of pathogenic microorganisms, and evaluate their impact on disease regression. * Explore the mechanism of interaction between pathogenic microorganisms and host autoimmune deficiencies. * Discover early warning and predictive markers and immunological indicators of pathogenic microorganisms, and explore new technologies and programs to reduce the mortality rate of infection.