AIDS, or Acquired Immunodeficiency Syndrome, is caused by the HIV virus. The virus attacks the body's immune system, specifically the CD4 cells (T cells), which are crucial for immune defense. Without treatment, HIV reduces the number of CD4 cells, making the body more susceptible to opportunistic infections and certain cancers. HIV is primarily transmitted through contact with infected bodily fluids, including blood, semen, vaginal fluids, and breast milk.
