Half of the new tuberculosis cases in sub-Saharan Africa are now HIV (human immunodeficiency virus) co-infected, the Forum for Collaborative Research reported on Thursday.

The research noted the dual epidemic are threatening the lives of millions of people in the region, especially in slum areas where both TB and HIV are rife.

"Because HIV has destroyed the immune systems of at least a quarter of the population in some areas, far more people are not only developing TB but spreading it to otherwise healthy neighbours," the report noted as quoted by BBC News.

Forum director Veronica Miller warned that 90 percent of people with HIV die in a short span of time of contracting tuberculosis.

In a poor country like Africa, a child is 100 times more likely to contract TB than anyone living in a more developed region.