Every year, 30 million people spend time in prisons or closed settings and 10 million are incarcerated at any given point in time. Virtually all will return to their communities, many within a few months to a year. Health in prisons and other closed settings is thus closely connected to the health of the wider society. Prisons are often overcrowded due to inappropriate, ineffective and excessive criminal laws. People who are already more likely to be exposed to HIV, including people who use drugs, sex workers, and gay men and other men who have sex with men, are overrepresented in prisons and other closed settings. Overcrowding increases vulnerability to infections such as HIV, tuberculosis and hepatitis. Prisoners are also at risk of violence and disruption in HIV prevention and treatment services, including access to harm reduction measures.
