Quick Answer

HIV is found through a blood test that detects antibodies, antigens, or viral RNA. Testing is available at clinics, doctor's offices, and with at-home kits. A positive result requires a confirmatory test. Modern treatment can make the virus undetectable, meaning it cannot be transmitted (U=U). HIV is the virus; AIDS is the advanced stage of untreated infection.

  • HIV tests detect antibodies or viral genetic material in blood or oral fluid.
  • The window period between exposure and detection is 2 to 6 weeks for most tests.
  • A reactive screening test must be confirmed with a more specific test.
  • Undetectable viral load means no risk of sexual transmission (U=U).
  • HIV is not the same as AIDS; AIDS is a late stage of HIV infection.
  • Early diagnosis and treatment preserve immune function and prevent progression.

Context Most Pages Skip

Knowing your HIV status is the only way to access life-saving treatment and prevent transmission. HIV is a retrovirus that attacks CD4 cells, the immune system's helpers. Without treatment, the virus can multiply and weaken immunity over years, eventually leading to AIDS. But today, antiretroviral therapy (ART) can suppress HIV to undetectable levels, meaning the virus cannot be passed to others and the person remains healthy. Testing is simple, confidential, and widely available. Understanding how testing works and what the results mean helps you take control of your health.

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⚕️ This page is educational and does not replace advice from a licensed clinician. If you may have been exposed to an STI, get tested — most infections are manageable, and many are fully curable.

Sources & Further Reading

Figures reflect CDC surveillance and WHO estimates; they are population statistics, not personal risk predictions.