Aids
AIDS stands for acquired immunodeficiency syndrome.
AIDS is the final stage of HIV infection. It can take years for a person infected with HIV, even without treatment, to reach this stage. Having AIDS means that the virus has weakened the immune system to the point at which the body has a difficult time fighting infections. When someone has one or more of these infections and a low number of T cells, he or she has AIDS.
For more information view CDC's questions and answers on "HIV Science".
Electron microscope image of HIV, seen as small spheres on the surface of white blood cells
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