HIV, or Human Immunodeficiency Virus, weakens your immune system by destroying important cells that fight disease and infection. Over time, HIV can destroy so many of your T-cells or CD4 cells, a key part of your immune system, that your body can’t fight infections and disease anymore. When this happens, HIV infection can lead to AIDS.
AIDS, or Acquired Immunodeficiency Syndrome, is a complex illness with a wide range of complications and symptoms. AIDS is the final stage of HIV. When individuals reach this stage, they are at high risk for opportunistic infections due to their badly damaged immune system.