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  1. About Sexually Transmitted Infections (STIs) | STI | CDC

    Mar 25, 2024 · A sexually transmitted disease (STD) develops because of an STI and the term implies that the infection has led to some symptom of disease. People sometimes use the …

  2. Sexually transmitted infection - Wikipedia

    A sexually transmitted infection (STI), also referred to as a sexually transmitted disease (STD) and the older term venereal disease (VD), is an infection that is spread by sexual activity, …

  3. Sexually transmitted diseases (STDs) - Symptoms and causes

    Sexually transmitted diseases (STDs) are caused by sexually transmitted infections (STIs). They are spread mainly by sexual contact. STIs are caused by bacteria, viruses or parasites. A …

  4. Sexually Transmitted Diseases (STDs): Causes, Tests, & Treatment - WebMD

    Oct 14, 2024 · STDs are sexually transmitted diseases. This means they are most often, but not exclusively, spread by sexual contact. STDs used to be called venereal diseases (VD). …

  5. Sexually Transmitted Diseases (Overview) - Harvard Health

    Sep 26, 2024 · Sexually transmitted diseases (STDs) are infections that are spread from person to person through sexual contact, including oral sex, anal sex and the sharing of sex toys.

  6. Sexually Transmitted Diseases (STD): Complete Guide | Ada

    Jul 23, 2025 · STD stands for sexually transmitted disease. This is an umbrella term for a number of conditions that are caused by viruses, bacteria, and parasites that get transferred from one …

  7. Sexually Transmitted Infections | STIs | Venereal Disease

    Jul 15, 2025 · Sexually transmitted infections (STIs) are infections that are passed from one person to another through sexual contact. If not treated, a STI can develop into a sexually …

  8. Overview of Sexually Transmitted Infections - MSD Manuals

    What are sexual transmitted infections (STIs)? STIs are infections that are passed from person to person through sexual contact, including oral sex. Common Myths and Facts About S... In …

  9. Sexually Transmitted Infections (STIs) - Yale Medicine

    STIs are infectious diseases caused by bacteria, viruses, and parasites that spread from person to person through vaginal, anal, and oral sex. Some STIs can also spread from other activities …

  10. Overview of Sexually Transmitted Infections (STIs)

    Sexually transmitted infections (STIs) spread through blood, semen, vaginal fluids, other body fluids, or skin-to-skin contact during oral, anal, or genital sex with an infected partner. Sexually …