AIDS stands for Acquired Immunodeficiency Syndrome. HIV and AIDS are the two different scenarios. Living with HIV doesn’t mean that person has AIDS. AIDS is caused by HIV virus as a last stage of HIV infection. HIV virus can spread through various modes such as getting infected blood, semen, or vaginal fluids, unclean syringe, unclean needles, mother to baby during pregnancy, etc. Currently AIDS disease is incurable but preventable.