ATTENTION

If you or someone you know is experiencing a mental health crisis, call 988 for 24/7 free and confidential crisis support. You do not have to be suicidal to call. Access more info and resources on suicide prevention, emotional and mental health support

toggle mobile menu Menu
toggle search menu

Site Navigation

Supplemental

Menu

Acquired immunodeficiency syndrome (AIDS)

Acquired immunodeficiency syndrome (AIDS)

Acquired immunodeficiency syndrome (AIDS) is the most severe stage of HIV infection. HIV attacks and destroys a type of white blood cell called CD4+ cells, or helper cells. These cells are an important part of the immune system. If HIV is not treated, it will usually get worse over time and cause AIDS.

A person who has HIV is diagnosed with AIDS when they have one or both of the following:

  • A CD4+ cell count below 200 cells per microliter (mcL) of blood.
  • Certain infections or cancers that are usually seen only in people who have problems with their immune system. Examples include infections such as Pneumocystis pneumonia and cancers such as Kaposi sarcoma.

Treating HIV can help the immune system stay healthy. This may delay or prevent AIDS.

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Healthwise is a URAC accredited health web site content provider. Privacy Policy. How this information was developed to help you make better health decisions.

© 1995- Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.