HIV
HIV (Human Immunodeficiency Virus) attacks the body's immune system in an
infected person, weakening the body's ability to fight off certain infections
and illnesses.
Someone who is "HIV-positive" does not necessarily have AIDS. HIV is
said to have advanced to AIDS when an infected person develops an AIDS-defining
illness (one or more of the conditions currently recognized by the Centers for
Disease Control and Prevention), or certain results on their blood tests, even
if they have not yet developed symptoms.
As is the case with many other diseases, early detection by a health care
provider is key to treating HIV infection.