The following answer comes from AIDS.gov:
“AIDS” is an acronym for Acquired Immunodeficiency Syndrome.
AIDS is the final stage of HIV infection, and not everyone who has HIV advances to this stage. People at this stage of HIV disease have badly damaged immune systems, which put them at risk for opportunistic infections (OIs).
“HIV” stands for Human Immunodeficiency Virus.
Unlike AIDS, it is possible for a human to be born already infected with HIV.
It is also possible that someone with HIV may progress to AIDS. Drugs and treatment now available can help keep the HIV virus at bay. With early detection and diligent care, it is now possible to for an HIV-infected person to live a long time.
HIV is not spread through:
Transmission mainly occurs via
Sexual intercourse with someone who has HIV
Sharing needles or other drug equipment with someone who has HIV
Though less common, HIV can also be spread via
At this time, there is no cure for HIV / AIDS.
There is also no way to vaccinate against contracting the disease.
However, antiretroviral therapy (ART), a treatment that involves taking a group of HIV medicines every day, can help people who are infected live longer.
Scientists around the world continue to research better treatments, new prevention methods, and ultimately a cure for HIV/AIDS.