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  1. What Are HIV and AIDS? - HIV.gov

    Nov 12, 2025 · AIDS is the late stage of HIV infection that occurs when the body’s immune system is badly damaged because of the virus. In the U.S., most people with HIV do not develop AIDS …

  2. HIV/AIDS - Wikipedia

    HIV/AIDS research includes all medical research which attempts to prevent, treat, or cure HIV/AIDS, along with fundamental research about the nature of HIV as an infectious agent, and about AIDS as …

  3. AIDS | Definition, Diagnosis, Treatment, & Facts | Britannica

    Nov 18, 2025 · AIDS is an infectious disease caused by human immunodeficiency virus (HIV). HIV slowly attacks and destroys the immune system, leaving an individual vulnerable to a variety of other …

  4. HIV/AIDS - Symptoms and causes - Mayo Clinic

    Feb 9, 2024 · You can have an HIV infection with few or no symptoms for years before it turns into AIDS. AIDS is diagnosed when the CD4 T cell count falls below 200 or you have a complication you …

  5. HIV and AIDS - World Health Organization (WHO)

    Jul 15, 2025 · Acquired immunodeficiency syndrome (AIDS) occurs at the most advanced stage of infection. HIV targets the body’s white blood cells, weakening the immune system. This makes it …

  6. About HIV | HIV | CDC

    Jan 14, 2025 · HIV (human immunodeficiency virus) is a virus that attacks the body's immune system. Without treatment, it can lead to AIDS (acquired immunodeficiency syndrome). There is currently no …

  7. HIV & AIDS: Causes, Symptoms, Treatment & Prevention

    AIDS is the final and most serious stage of an HIV infection. People with AIDS have very low counts of certain white blood cells and severely damaged immune systems. They may have additional …

  8. HIV/AIDS: Facts, Statistics, Symptoms, Causes, Diagnosis, and ...

    Oct 6, 2025 · Discover how HIV spreads, how to prevent the virus progressing to AIDS, and where to get treatment.

  9. The Stages of HIV Infection - NIH

    Mar 31, 2025 · Without treatment using HIV medicines, HIV infection advances in stages, getting worse over time. The three stages of HIV infection are (1) acute HIV infection, (2) chronic HIV infection, and …

  10. Home - AIDS.org

    2 days ago · Acquired Immune Deficiency Syndrome (AIDS) was first recognized as a distinct medical condition in 1981, and since then, it has become one of the world’s leading causes of death. In the …