AIDS is caused by human immunodeficiency virus (HIV). HIV kills or damages the body's immune system cells.
There are two types of HIV. Type I and Type II. Type I is more common in India.
AIDS is generally caused by unprotected sex with an infected partner. It may also spread through the use of infected syringes of HIV infected people and blood transfusions.
The first signs of AIDS is influenza (flu) like symptoms or may be swollen glands but at times symptoms might not appear. Symptoms may appear after two or three months. Generally, blood test is done to confirm the diagnosis. There is no cure, but there are many medicines to fight/ control HIV infection.