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Sexually transmitted diseases STDs are infections that spread from person to person through sexual activity, including anal, vaginal, or oral sex. STD stands for sexually transmitted disease. STDs are infections that spread from person to person through sexual activity, including anal, vaginal, or oral sex.

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Getting to zero? HIV criminalization and treatment adherence surveillance. Hepatitis C: From discovery to elimination in 40 years?

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Acquired immunodeficiency syndrome AIDS is a chronic, potentially life-threatening condition caused by the human immunodeficiency virus HIV. By damaging your immune system, HIV interferes with your body's ability to fight the organisms that cause disease. It can also be spread by contact with infected blood or from mother to child during pregnancy, childbirth or breast-feeding.

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Vaginal sex intercourse involves inserting the penis into the vagina. Some sexual activities are riskier than others for getting or transmitting HIV. Activities like oral sex, touching, and kissing carry little to no risk for getting or transmitting HIV.

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HIV is an infection caused by the human immunodeficiency virus also referred to as HIVwhich is transmitted through blood, semen, and certain other specific bodily fluids. For this reason, the primary risk factors for infection are related to lifestyle behaviors such as having unprotected sex and sharing needles to inject recreational drugs. The virus also can be passed from a mother to her baby during pregnancy, childbirth, or through breastmilk but it is not a genetic disease.

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The most important sexually transmitted infections and infectious agents are:. Travellers who are infected with HIV should consult their personal physician for a detailed assessment and advice before travel. Sexual infections are transmitted during unprotected sexual intercourse both heterosexual and homosexual — anal, vaginal or oral.

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HIV belongs to a group of viruses called retroviruses. Like all viruses, retroviruses can only reproduce within a host cell. Helper T lymphocytes help to activate and co-ordinate some of the other cells of the immune system so that the body can fight off invading organisms and cancerous cells.

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During a median follow-up period of 1. No HIV transmissions occurred. The investigators concluded that the risk of HIV transmission through vaginal intercourse in these circumstances was effectively zero Rodger. When HIV is not suppressed by antiretroviral treatment, vaginal intercourse without a condom is a highly efficient route of HIV transmission because high concentrations of HIV can occur in semen and vaginal fluids, and because the genital tissues are very susceptible to infection.

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All A-Z health topics. View all pages in this section. Abstinence, or not having any type of sex, is the best way to avoid HIV.

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If you and your partners are not infected with HIV, there is no risk. HIV needs to get into the body for infection to occur. The greatest risk is when blood or sexual fluid touches the soft, moist areas mucous membrane inside the rectum, vagina, mouth, or at the tip of the penis.


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