HIV is known to accelerate changes to the brain that can cause changes is memory, depression and other side effects. While these are also common with aging, the effects of HIV can accelerate this and delaying treatment or for those who were positive before effective medications were available, there may be damage already done. The key message is if you are diagnosed, start medication as soon as you can, regardless of your CD4 or viral load numbers. TheBody magazine presents an interview with a key researcher in this area, well worth the short read and maybe a discussion with your doc.

https://www.thebody.com/hiv/will-hiv-affect-brain-health-aging