AIDS, or Acquired Immune Deficiency Syndrome, is developed from infection by the human immunodeficiency virus (HIV). After this pathogen invades the human body, it can infringe upon and ravage the immune system, weakening a person 's resistance to disease. This allows opportunistic infections of viruses, bacteria, fungi and protozoa to flourish, and encourages the development of certain forms of cancer, finally leading to death.
愛滋病又名「後天免疫缺乏癥候群」，是由感染 HIV 病毒引起的，此種病毒侵入人體後，會侵犯、破壞人體的免疫系統，使人免疫機能降低，導致病毒、細菌、黴菌、原蟲入侵，引發各種「伺機感染」，或發生某些癌症，最後導致死亡。