The subject of HIV and AIDS is a sensitive subject people try to avoid. People affected with HIV/AIDS are often rejected by society because it is a life threatening disease that causes people to react strongly towards it. In all realty many disassociate themselves from those with HIV/AIDS, because of fear of "catching" it. These actions are the result of not being educated about the illness. HIV is a virus that is transmitted from person to person through the exchange of body fluids such as blood, semen, breast milk and vaginal secretions. Sexual contact is the most common way to spread HIV/AIDS, but it can also be transmitted by sharing needles when injecting drugs, or during childbirth. Despite this obtainable knowledge (practically everywhere) many in society continue to stigmatize HIV/AIDS because they believe the people affected caused it upon themselves. (personal irresponsibility) Also, HIV infection is associated with behaviors (such as homosexuality, drug addiction, and prostitution) which are already stigmatized in many societies.
Below is a video, of a doctor making statements regarding HIV/AIDS discrimination.
Stigma and discrimination are enemies of public health. HIV/AIDS-related stigmatization and discrimination threaten the effectiveness of HIV prevention and care programs. They create negative impacts on effective prevention by discouraging individuals from coming forward for testing, and from seeking information on how to protect themselves and others, deepening the adverse impact of living with HIV/AIDS.
Here is another video of someone voicing how stigma prevents people to open up about being HIV positive.