In this photo taken Thursday, Nov. 15, 2012 an unidentified patient prepares to be tested for TB, at the US sponsored Themba Lethu, HIV/AIDS Clinic, at the Helen Joseph hospital, in Johannesburg. In the early 90s when South Africa's Themba Lethu clinic could only treat HIV/AIDS patients for opportunistic diseases, many would come in on wheelchairs and keep coming to the health center until they died. Two decades later the clinic is the biggest ARV (anti-retroviral) treatment center in the country and sees between 600 to 800 patients a day from all over southern Africa. Those who are brought in on wheelchairs, sometimes on the brink of death, get the crucial drugs and often become healthy and are walking within weeks. (AP Photo/Denis Farrell)
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