World Health Organization (WHO) -
According to these guidelines, countries need to remove legal and social barriers that prevent many people from accessing services for HIV testing, treatment and care. The guidelines outline steps for countries to take in reducing new infections and increasing access to services for five key populations: men who have sex with men, people in prison, people who inject drugs, sex workers and transgender people. They conclude that failure to provide adequate services to these groups threatens regional and global progress in responding to HIV.