Africa: No Man's Land in Diseases

Ever since, when scientists discovered that Africa was "unhealthy," was the day that all kinds of diseases emerged. So, the scientists discovered smallpox, and eliminated it. But then, Malaria, Yellow Fever, Dengue Fever, Mousepox, Ebola, Rift Valley Fever, Rabies, Sleeping Sickness, Rocky Mountain Fever, and other diseases ever known to mankind emerged. These bio safety diseases got out of hand a lot of times. For example, Ebola. All it did was fly, blow up cells, and hemorrhage everything in the body. There's Rift Valley Fever, when it stiffs up muscles, pukes, lose vision, and hemorrhage. Also, there's AIDS. It's not as dangerous, but comes from hiding in the cells. It rots the skin, you lose fingers, toes, giving you a terrible death. Bacterial diseases like Malaria and Rabies are curable, because antibiotics kills them. It's not the same with viruses. They're smaller than bacteria, and they insert in genetic material to grow clones, and burst out of them, when there is no space left. Also, some of the diseases have gone world famous, like AIDS, Mousepox, and Malaria. Scientists are trying to make vaccines to cure these viral diseases. Will it ever work for viruses? Can scientists be able to help suffering Africans from these diseases?  Will these African diseases ever cause the destruction of the world?