<p><strong>Acquired immune deficiency syndrome (AIDS) </strong>is caused by the human immune deficiency virus (HIV) which kills or damages cells of the body's immune system by progressively destroying the body's ability to fight infections and certain cancers.</p> <p>People diagnosed with AIDS may get life-threatening diseases called opportunistic infections, which are caused by microbes such as viruses or bacteria that usually do not make healthy people sick.</p>
Definition two:
Acquired Immune Deficiency Syndrome (AIDS) means a disease, often passed on through sexual contact, that attacks the immune system of the body.