What is HIV? How is it different from AIDS? Can HIV be prevented?

HIV stands for Human Immuno-deficiency Virus. It is a virus which causes AIDS. AIDS stands for Acquired Immuno deficiency Syndrome.
The difference between HIV and AIDS is that HIV is a virus which acts as the vector or causative agent for the disease that is called AIDS.

Following are the ways to prevent AIDS:

1. Screening of blood before transfusion
2. Avoiding sharing and reuse of blades, needles and syringes and surgical instruments.
3. Avoiding pregnancy if mother is HIV positive
4. Safe sex
5. Educating people