HIV signs and symptoms change over time as the virus progresses through three stages. Early symptoms mimic the flu, while late-stage HIV causes severe immune system damage.
After initial infection, HIV attacks CD4 cells, which help the immune system fight infections. Without treatment, HIV reduces the number of CD4 cells, progressing through three stages:
The most common HIV signs and symptoms appear in distinct clusters during each stage. Some people may not show symptoms for years.
| Stage | Symptoms | Onset |
|---|---|---|
| Acute HIV infection | Fever, sore throat, swollen lymph nodes, rash, muscle pain | 2-4 weeks after exposure |
| Clinical latency | Few or no symptoms | Years |
| AIDS | Rapid weight loss, extreme fatigue, recurring fever, persistent diarrhea, pneumonia | Without treatment, 8-10 years after infection |
Many people mistake early HIV symptoms for the flu or another viral infection. A rash appears in about 80% of acute HIV cases, often overlooked because it resembles other conditions. I once treated a patient whose persistent rash and fatigue were initially dismissed as stress-related until HIV testing confirmed acute infection.
The CDC recommends HIV testing for anyone with symptoms or at risk. Early diagnosis allows for timely treatment, reducing the risk of progression to AIDS. Antiretroviral therapy (ART) can control the virus, even if symptoms are absent.