HIV vs AIDS

HIV vs AIDS is a distinction that confuses many people, but the difference is straightforward. HIV, or human immunodeficiency virus, is the virus that attacks the immune system. AIDS, or acquired immunodeficiency syndrome, is the most advanced stage of an HIV infection, diagnosed when the immune system is badly damaged or certain infections appear. A person can live with HIV for years without developing AIDS, especially with modern treatment. HIV spreads through blood, semen, vaginal fluids, and breast milk, and it destroys CD4 cells that help the body fight infection. When CD4 counts drop very low, or specific opportunistic infections appear, the diagnosis becomes AIDS.

HIV Is the Virus

HIV is a retrovirus that infects and destroys CD4 cells, also called T cells, which are essential to the immune system. It is transmitted through sexual contact, shared needles, and from mother to baby during pregnancy, birth, or breastfeeding. Many people with HIV have no symptoms for years, which is why testing is the only way to know.

With antiretroviral therapy, HIV is controlled to undetectable levels in the blood. People on effective treatment can live long, healthy lives, and an undetectable viral load means the virus cannot be passed to sexual partners.

AIDS Is the Advanced Stage

AIDS is diagnosed when a person with HIV has a CD4 count below 200 cells per cubic millimeter, or when they develop certain opportunistic infections or cancers, such as pneumocystis pneumonia or Kaposi sarcoma. Without treatment, HIV can progress to AIDS over many years.

AIDS is not a separate virus. It is the end stage of an untreated HIV infection, and it leaves the body vulnerable to serious infections. Modern treatment prevents progression to AIDS in nearly all people who are diagnosed and treated early.

How HIV Progresses to AIDS

Without treatment, HIV slowly destroys CD4 cells over an average of eight to ten years. During this time the person usually feels fine. As the CD4 count falls, milder infections may appear, and when it drops below 200, the diagnosis becomes AIDS.

With antiretroviral therapy started soon after diagnosis, the immune system stays healthy and AIDS is largely preventable. The earlier the infection is found, the better the long term outlook, which is why routine testing is recommended.

Testing and Treatment

HIV is diagnosed with a blood test, and a fourth generation test can detect the infection within 18 to 45 days of exposure, with most infections found by four weeks. A positive result is confirmed with a second test before a diagnosis is made.

If you test positive, treatment starts as soon as possible. Modern medication is safe, effective, and usually one pill a day. Testing is the first step, whether for routine screening or after a possible exposure, and knowing your status puts you in control of your health.

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