
What Are HIV and AIDS? - HIV.gov
Jan 23, 2026 · HIV is a virus that can make it harder for your body to fight other infections and diseases. If HIV is left untreated, it can lead to AIDS, a late stage of infection that happens …
HIV and AIDS - World Health Organization (WHO)
Jul 15, 2025 · Human immunodeficiency virus (HIV) is a virus that attacks the body’s immune system. Acquired immunodeficiency syndrome (AIDS) occurs at the most advanced stage of …
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 …
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, …
HIV and AIDS: The Basics | NIH - HIVinfo
May 28, 2025 · When people with HIV do not receive treatment, more severe HIV symptoms may appear years later, as HIV develops into AIDS. People with AIDS have weakened immune …
HIV/AIDS - Symptoms and causes - Mayo Clinic
Feb 9, 2024 · HIV is spread through contact with genitals, such as during sex without a condom. This type of infection is called a sexually transmitted infection, also called an STI. HIV also is …
AIDS | Definition, Diagnosis, Treatment, & Facts | Britannica
Jan 20, 2026 · 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 …
Understanding HIV: What You Need to Know - aids.org
HIV stands for Human Immunodeficiency Virus. It attacks the immune system, specifically the CD4 cells (T cells), which help the body fight off infections. If left untreated, HIV can lead to …
HIV | HIV Symptoms | AIDS | MedlinePlus
Mar 26, 2025 · HIV harms your immune system by destroying a type of white blood cell that helps your body fight infection. This puts you at risk for other infections and diseases. What is AIDS? …
HIV and AIDS - Basic facts | UNAIDS
AIDS stands for acquired immunodeficiency syndrome and describes the collection of symptoms and infections associated with acquired deficiency of the immune system. Infection with HIV …