URL of this page: https://medlineplus.gov/hivaids.html

HIV/AIDS

Also called: Acquired immunodeficiency syndrome, AIDS, HIV, Human immunodeficiency virus

Summary

What is HIV?

HIV stands for human immunodeficiency virus. It harms your immune system by destroying a type of white blood cell that helps your body fight infection. This puts you at risk for serious infections and certain cancers.

What is AIDS?

AIDS stands for acquired immunodeficiency syndrome. It is the final stage of infection with HIV. It happens when the body's immune system is badly damaged because of the virus. Not everyone with HIV develops AIDS.

How does HIV spread?

HIV can spread in different ways:

  • Through unprotected sex with a person with HIV. This is the most common way that it spreads.
  • By sharing drug needles
  • Through contact with the blood of a person with HIV
  • From mother to baby during pregnancy, childbirth, or breastfeeding

Who is at risk for HIV infection?

Anyone can get HIV, but certain groups have a higher risk of getting it:

  • People who have another sexually transmitted disease (STD). Having an STD can increase your risk of getting or spreading HIV.
  • People who inject drugs with shared needles
  • • Gay and bisexual men, especially those who are Black/African American or Hispanic/Latino American
  • People who engage in risky sexual behaviors, such as not using condoms

What are the symptoms of HIV/AIDS?

The first signs of HIV infection may be flu-like symptoms:

These symptoms may come and go within two to four weeks. This stage is called acute HIV infection.

If the infection is not treated, it becomes chronic HIV infection. Often, there are no symptoms during this stage. If it is not treated, eventually the virus will weaken your body's immune system. Then the infection will progress to AIDS. This is the late stage of HIV infection. With AIDS, your immune system is badly damaged. You can get more and more severe infections. These are known as opportunistic infections (OIs).

Some people may not feel sick during the earlier stages of HIV infection. So the only way to know for sure whether you have HIV is to get tested.

How do I know if I have HIV?

A blood test can tell if you have HIV infection. Your health care provider can do the test, or you can use a home testing kit. You can also use the CDC Testing Locator to find free testing sites.

What are the treatments for HIV/AIDS?

There is no cure for HIV infection, but it can be treated with medicines. This is called antiretroviral therapy (ART). ART can make HIV infection a manageable chronic condition. It also reduces the risk of spreading the virus to others.

Most people with HIV live long and healthy lives if they get and stay on ART. It's also important to take care of yourself. Making sure that you have the support you need, living a healthy lifestyle, and getting regular medical care can help you enjoy a better quality of life.

Can HIV/AIDS be prevented?

You can reduce the risk of spreading HIV by

  • Getting tested for HIV
  • Choosing less risky sexual behaviors. This includes limiting the number of sexual partners you have and using latex condoms every time you have sex. If your or your partner is allergic to latex, you can use polyurethane condoms.
  • Getting tested and treated for sexually transmitted diseases (STDs)
  • Not injecting drugs
  • Talking to your health care provider about medicines to prevent HIV:
    • PrEP (pre-exposure prophylaxis) is for people who don't already have HIV but are at very high risk of getting it. PrEP is daily medicine that can reduce this risk.
    • PEP (post-exposure prophylaxis) is for people who have possibly been exposed to HIV. It is only for emergency situations. PEP must be started within 72 hours after a possible exposure to HIV.

NIH: National Institutes of Health

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Symptoms

  • Symptoms of HIV (HIV.gov; National Institutes of Health, Office of AIDS Research)

Diagnosis and Tests

Prevention and Risk Factors

Treatments and Therapies

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Reference Desk

  • Glossary From the National Institutes of Health (HIV.gov; National Institutes of Health, Office of AIDS Research)
  • HIV Life Cycle From the National Institutes of Health (National Institutes of Health, Office of AIDS Research) Also in Spanish

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The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.