HIV/AIDS is still a problem in Africa today (allegedly). There are definitely well developed parts in Africa right now. I haven't checked the statistics, but I bet that the malnourished people are ove...
That doesn't mean anything. People with HIV end up with a low CD4 count and then get things like Kaposi's sarcoma. If you treat their HIV then their CD4 count goes up and the Kaposi sarcoma goes away. Kaposi sarcoma is seen in all demographics with advanced HIV. Often people with advanced HIV appear malnourished because they're so beset by opportunistic infections.