The U.N. Children's Fund (UNICEF) is launching its Nigerian campaign because it has the third highest number of people with the disease.
More than 39 million people are living with HIV/AIDS across the world.
Nigeria ranks third in the world after India and South Africa.
UN agencies called for anti-retroviral drugs to be given to more pregnant women to avoid a "catastrophic" rise in infections.
Tegegnework Gettu, U.N. resident coordinator in Nigeria, says that, "the problem is very deep in Nigeria, it has a huge implication for the whole continent."
