This bloodborne disease disables the body's immune system until it is no longer capable of fighting infection. It does this by attacking and destroying the infection-fighting CD4 cells of the immune system. The loss of CD4 cells makes it difficult for the body to fight infections and certain cancers. Once a person becomes immunocompromised, he or she can exhibit symptoms of weight loss, persistent low-grade fever, night sweats, and flu-like symptoms. The person is also more vulnerable to pneumonias, intestinal disorders, and fungal infections.

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