HIV/AIDS Causes and Risk Factors  
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Do You Know How HIV Spreads?
It's A Fact.
Half of the new HIV infections reported each year occur in people 25 years of age and under
How HIV Causes AIDS
A significant component of the research effort of the National Institute of Allergy and Infectious Diseases (NIAID) is devoted to the pathogenesis of HIV (human immunodeficiency virus) disease.
The Evidence that HIV Causes AIDS
"AIDS is caused by infection with a virus called human immunodeficiency virus (HIV). This virus is passed from one person to another through blood-to-blood and sexual contact
Causes of HIV and AIDS
HIV disease is characterized by a gradual deterioration of immune function. Most notably, crucial immune cells called CD4+ T cells are disabled and killed during the typical course of infection.
Causes of HIV - How the epidemic starts
Nobody knows for sure exactly what causes HIV. Researchers certainly know how the virus is made up and how it attacks the body - but where it actually came from is a medical mystery
HIV Risk Factors by Sexual Acts
Risk of infection with HIV shown in a table characterize by High Risk, Moderate Risk and Low Risk
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