Infectious Diseases in Prisons: HIV, Hepatitis & Tuberculosis
http://www.prisonpoz.org/
http://www.who.int/gtb/policyrd/TBPrisons.htm
http://www.thebody.com/whatis/prison.html

Access to Health Care for the Incarcerated
http://www.atac-usa.org/Prisons.html

Prison Activism
http://www.criticalresistance.org/
http://www.prisonactivist.org/

U.S. Prison Statistics
http://www.ojp.usdoj.gov/bjs/
http://biotech.law.lsu.edu/cases/prisons/medical/v1/v1.htm

Mental Illness in Prisons
http://www.hrw.org/reports/2003/usa1003/
http://www.prisonmentalhealth.org/

Further Reading
http://books.prisonwall.org/