According to a BBC report, scientists working in Kenya believe that there may be a link between malaria and the spread of AIDS across the African continent.
The study, published in the journal Science, says the way the two diseases interact can help them spread faster.
When people with Aids contract malaria, it causes a surge of HIV virus in their blood, making them more likely to infect a partner, the research says.
Meanwhile people weakened by HIV are more likely to catch malaria.
AIDS and malaria are the two biggest natural killers in Africa.
Note: the abstract of the Science article can be found here.