The United Nations Aids agency is urging African countries to protect young women and children.
It says they are bearing the brunt of the continent's Aids epidemic.
More than half a million children up to the age of 15 in West and Central Africa are believed to be infected with the virus.
The call was made at a conference on HIV and Aids, which is under way in the Ivory Coast.
Al Jazeera's Ahmed Idris reports from Lagos.