HIV prevention is a research area focused on developing strategies and interventions aimed at reducing the transmission of HIV, the virus that causes AIDS. This includes promoting safe sex practices, increasing access to HIV testing and counseling, promoting the use of condoms and other barrier methods, and advocating for pre-exposure prophylaxis (PrEP) and post-exposure prophylaxis (PEP) for individuals at high risk of HIV infection. Research in this area also explores the impact of social, behavioral, and structural factors on HIV prevention efforts, as well as the development of vaccines and other biomedical interventions to prevent HIV transmission. Overall, the goal of HIV prevention research is to reduce the spread of HIV and improve the health outcomes of individuals at risk of or living with HIV.