More than 80 million Africans may die from Aids by 2025, the United Nations said in a report released today.
Infections could soar to 90 million - or more than 10 per cent of the continent's population - if more is not done soon to fight the disease, it warned.
More than 25 million African have already been infected with HIV, the virus that causes Aids.
UNAIDS estimated that more than €1 billion is needed to save 16 million people from death and 43 million people from becoming infected, but donors have pledged nowhere near that amount.
In the report Aids in Africa, the UN agency examines three potential scenarios for the continent in the next 20 years - depending on the international community's contribution to fighting the epidemic.
Researchers determined that even with massive funding and better treatment, the number of Africans who are going to die from the virus is likely to top 67 million.
The three scenarios include a best-case situation, a middle-case and a doomsday scenario. They all warn that the worst of the epidemic's impact is still to come.
"There is no single policy prescription that will change the outcome of the epidemic," the report stated. "The death toll will continue to rise no matter what is done."
Under the worst-case scenario, experts have plotted current policies and funding over the next two decades. "It offers a disturbing window on the future death toll across the continent, with the cumulative number of people dying from Aids increasing more than fourfold," it says.
"The number of children orphaned by the epidemic will continue to rise beyond 2025."
Aids already has a devastating impact on the continent. UNAIDS has reported that life expectancy in nine countries has dropped to below 40 because of the disease. There are 11 million orphans, and 6,500 people are dying each day.
AP