HIV untreated has the affect to leave your body much weaker when fighting infections. This is caused by a number of T cells that are unleashed upon the body, this damages the immune system which can make the fight against infections much harder for it to win. These events can lead to other much deadlier diseases such as cancer cells being let on to your body, letting the AIDS take over the process.
Some key factors that a patient and doctor can consider for preventing the spread of these causes are things like, therapy, some useful drugs to take, or even more therapy is desired to. But taking drugs too early can result in no change. Talking to your doctor will help the situation much more than you think it will. If you do take drugs early it can lead to, nausea, physical illness, and your mental stability may not be able to handle the drug.
Some drugs can help quickly, such as antiretroviral drugs, which are the main drug that all doctors use in infections and serious and early stages of AIDS.
Health Science Blog 