AIDS
HIV does not refer to a disease, but a virus that in-turn causes the disease AIDS. HIV is transmissible via the blood and saliva.
A mouth disease can't cause HIV.
PID can't turn into HIV or AIDS. Anyone diagnosed with PID should be tested for HIV and other STDs as well. Contact your health care provider to make sure you were tested.
The autoimmune disease caused by the HIV virus is AIDS.
In essence it is both; the HIV infection occurs which leads to the disease AIDS.
The difference between HIV and AIDS is that HIV is the virus that causes the disease AIDS. You can be a carrier of the HIV virus and not contract the disease but you can infect others.
Lupus has nothing to do with HIV AIDS. Lupus is an autoimmune disease. HIV AIDS is an immunodeficienty disease transmitted by a virus.
HIV is a virus; AIDS is a disease.
A disease
HIV is the virus. AIDS is the disease caused by the virus. (So HIV is not actually a disease per se.) As an analogue - the H1N1 virus can cause the flu.
HIV infection or AIDS is the disease, which you have infection by HIV virus, that attacks disease fighting cells in the blood.
That a person does not have HIV or a sexually transmitted disease.