The autonomic nervous system (ANS or visceral nervous system) is the part of the peripheral nervous system that acts as a control system functioning largely below the level of consciousness, and controls visceral functions.
ART significantly extends the likelihood of surviving for several decades, according to the U.S. Department of Health & Human Services. If untreated, HIV-positive persons typically live in clinical latency for around 10 years. Individuals on ART are not likely to have their HIV infection reach the AIDS stage. If the viral infection progresses to that stage, survival is estimated at around three years.
Overall, a 20 year-old starting HIV treatment between 1996 and 2005 would be expected to live another 43 years. Between 1996 and 1999, they calculated that such a patient would live to be 56 years old, but in the period 2002 to 2005 this had improved to a little under 70 years.