Objective: To investigate the awareness, sexual behavior characteristics and infection status of AIDS among male floating population in Anhui Province, so as to provide insights into formulating prevention and control measures for male floating population. Methods: Male floating population of three occupations including construction workers, enterprise workers, and business operators in Wuhu, Tongling, Hefei, and Fuyang cities were selected using stratified cluster random method from April to August 2021. Demographic information, knowledge of AIDS and high-risk behaviors were collected through questionnaires surveys. The results of HIV, syphilis and hepatitis C virus (HCV) antibody testing were collected through laboratory tests. Awareness rate of AIDS knowledge, sexual behavior characteristics, and positive rates of HIV, syphilis, and HCV among male floating population of different occupations were analyzed. Results: A total of 1 616 people were enrolled, including 1 016 construction workers (62.87%), 253 enterprise workers (15.66%) and 347 business operators (21.47%), and had a mean age of (40.63±12.32) years. The overall awareness rate of AIDS knowledge among male floating population was 89.54%, the awareness rates of business operators, construction workers, and enterprise workers were 98.33%, 88.29% and 82.61%, respectively, and the difference was statistically significant (P<0.05). The proportions of consistent condom use during sexual intercourse with a spouse or cohabitant, during commercial sexual encounters, and with casual partners in the past year were 7.15% (91/1 273), 64.00% (16/25) and 50.00% (8/16), respectively. The proportions of construction workers, enterprise workers, and business operators who used condoms every time they had sexual behavior with their spouses/cohabitants in the past year were 4.54%, 11.63%, and 15.60%, respectively, with statistically significant differences (P<0.05). One case of HIV, one case of syphilis, and three cases of HCV antibody were detected. Conclusion The overall awareness rate of AIDS knowledge among the male floating population in Anhui Province is relatively high, but unsafe sex behaviors exist, which may lead to the risk of HIV infection.

Objective: To understand the awareness and service utilization of HIV preexposure prophylaxis (PrEP) and postexposure prophylaxis (PEP) among the young students aged 15-24 in Hefei, so as to provide reference for the prevention and treatment of AIDS among young students in the future. Methods: From May to June 2022, a stratified random cluster sampling method was used to select two different types of universities(undergraduate and vocational colleges) in Hefei, and a crosssectional survey was conducted among the 916 young students at the selected schools. The Chisquare test was used for statistical analysis. Results: Among the surveyed young students, 88.4% had heterosexual orientation, and 12.4% had sexual behavior including 8.8% of homosexual sexual behavior and 91.2% of heterosexual sexual behavior. The rate of condom use was 70.0% in the last homosexual intercourse, and the rate of condom use was 83.7% in the last heterosexual intercourse. About 41.9% of young students heard of PrEP, and the proportions of young students who knew about PrEP, consulted PrEP and used PrEP were 43.0%, 15.9% and 9.4% respectively. About 38.3% of young students had heard of PEP, and the proportions of young students who knew about PEP, consulted PEP and used PEP were 18.2%, 15.4% and 6.0%. Conclusions The awareness rate and utilization rate of PrEP and PEP among young students in Hefei are relatively low. PrEP and PEP publicity should be combined with education of HIV knowledge, and enhance the awareness rate of the young students, in order to reduce the risk of AIDS infection among young students with highrisk behaviors.