In 2003 , Lange completed a study on the children of HIV-positive volunteer mothers in Rwanda and Uganda . He found that a baby 's chance of contracting HIV falls to less than 1 % if they receive anti-retroviral drugs while being nursed . The findings of the study were announced by Lange at the 2003 International AIDS Society meeting in Paris . During the 10th Conference on Retroviruses and Opportunistic Infections in Boston , Lange announced the results of a large multicenter clinical trial with the involvement of 1,216 patients in 17 countries . According to Lange , who served as principal investigator , these findings " clearly demonstrate the comparable efficacy of nevirapine and efavirenz in HIV treatment "
Conference on Retroviruses and Opportunistic Infections
Conference on Retroviruses and Opportunistic Infections
Joep Lange