AIDS, or Acquired Immunodeficiency Syndrome, is a serious health condition caused by the HIV virus, which attacks the body's immune system. This makes it difficult for the body to fight off infections and diseases. People with AIDS may experience a range of symptoms and are more susceptible to opportunistic infections, which can be life-threatening. The transmission of HIV occurs through contact with infected bodily fluids, such as blood, semen, vaginal fluids, and breast milk. Preventative measures include safe sex practices, regular testing, and the use of antiretroviral therapy to manage the virus. Early diagnosis and treatment can help individuals live longer, healthier lives.