References UK clinical guidance from the NHS, the British HIV Association (BHIVA), and the British Association for Sexual Health and HIV (BASHH). Last updated: April 2026.
HIV infection progresses through stages if left untreated — from acute infection through a long asymptomatic phase to advanced disease (AIDS). With modern treatment, most people never progress beyond the early stages. Understanding the stages helps explain why early diagnosis and treatment matter so much.
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The Stages
| Stage | Timing | Features |
|---|---|---|
| Acute (seroconversion) | 2-4 weeks | Flu-like illness, very high viral load |
| Clinical latency | Years (5-10+) | Few or no symptoms; CD4 slowly falls |
| Symptomatic HIV | Variable | Weight loss, infections, skin problems |
| AIDS | 8-10 years without treatment | CD4 below 200; opportunistic infections |
With Treatment
- Viral load becomes undetectable
- CD4 recovers
- Most people stay in early stages indefinitely
- Near-normal life expectancy
Read more: Untreated HIV | HIV vs AIDS | HIV and the immune system
Frequently Asked Questions
Does everyone progress to AIDS?
Not with treatment — most never reach this stage.
How long can the latent stage last?
Years to decades without treatment; indefinitely with ART.
Can treatment reverse damage from late stages?
Often significantly, though earlier is always better.
Related reading
- A to Z of Sex: Sexual Health Terms Explained
- Alcohol and HIV: What You Need to Know
- Anxiety and HIV: Coping and Getting Support
- Are All STIs Curable?
- Blood Problems and HIV: Anaemia, Low Platelets and More
Sources
- NHS — Sexual health conditions
- BASHH — UK clinical guidelines for STI management
- British HIV Association (BHIVA) — HIV treatment guidelines
- Terrence Higgins Trust — sexual health information
- UK Health Security Agency — STI surveillance data
Steve Page is a recognised expert on Sexually Transmitted Diseases (STDs) and STD treatments, having published numerous articles in peer-reviewed journals and presented his research at conferences around the world. He has an in-depth understanding of the latest medical research on STDs, and is an advocate for the development of new treatments and protocols to improve the health of those affected. In addition to his research, he has dedicated his career to understanding the causes and symptoms of STDs, as well as how to best treat those impacted.
