Tenofovir studies to test the safety of a treatment to prevent transmission of HIV were to take place in Botswana, Cambodia, Cameroon, Ghana, Malawi, Nigeria, Thailand and the United States. Following protests by sex worker organizations, trials were halted in several countries because the trials required participants to be at high risk of exposure to HIV…

2004: Tenofovir trials halted

• Cambodian sex workers seek insurance for HIV study — report
  Associated Press, March 26, 2004
• Cambodian workers say 'No' to Bill Gates-funded HIV drug study
  Associated Press, March 29, 2004
• Prostitutes protest AIDS-drug test Bay Area company hit with charges of exploitation
  San Francisco Chronicle, July 14, 2004
• Cambodian study of tenofovir for HIV prevention halted, PM cites 'human rights'
  AidsMap, August 13, 2004

2005: Tenofovir trials protests blamed

• Media reporting of tenofovir trials in Cambodia and Cameroon
  BMC International Health and Human Rights, August 24, 2005
• Careless reporting on HIV 'could cost lives'
  Science & Development Network, August 25, 2005
• HIV prevention research in a resource-limited setting the experience of planning a trial in Cambodia
  The Lancet, October 22, 2005