Researchers have found an aggressive new strain of HIV in West Africa that develops into AIDS much faster than other strains

The strain is a "recombinant" virus, or a combination of two different viruses that join together in the body to create a completely new virus. This particular strain combines the two most common HIV strains in Guinea-Bissau, West Africa. And it's pretty strong: Scientists say that the new strain can develop into AIDS in just five years. That's up to two-and-a-half years faster than either of its parent strains. So far, the strain has only been seen in Guinea-Bissau, but researchers warn that it could spread quickly.