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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 …

  2. 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 …

  3. 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 …

  4. 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 …

  5. 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 …

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

    Jun 6, 2022 · The difference between HIV and AIDS is that HIV is a virus that weakens your immune system. AIDS is a condition that can happen as a result of an HIV infection when your …

  7. HIV and AIDS: The Basics | NIH - HIVinfo

    May 28, 2025 · HIV stands for human immunodeficiency virus, which is the virus that causes HIV infection. The acronym “HIV” can refer to the virus or to HIV infection. AIDS stands for …

  8. WHAT IS AIDS? - AIDS.org

    HIV disease becomes AIDS when your immune system is seriously damaged. If you have less than 200 CD4 cells or if your CD4 percentage is less than 14%, you have AIDS.

  9. 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.

  10. What Is AIDS? - MSN

    Acquired immunodeficiency syndrome (AIDS) is the most advanced stage of human immunodeficiency virus (HIV) infection. At this point, the virus has infected and killed so many …