The lexical meaning of AIDS is the symptom deficiency of immunity which cause the disease and brings death. Centre for Disease Control of Atlanta ,Georgia,America first discovered AIDS in june 1981.According to the report of WHO now there are patients in 164 countries of the world .Acquired Immune Dificiency Syndrom- the first letters of these four English words make the name of the disease AIDS.The reasons of AIDS are 1. Free mixing of man and woman .2.The blod an AIDS patient is transfured into a healthy person .3.It can be transported into a babys body from his AIDS afflicted father or mother.4.Through the niddle,syrings,the apparatus of dentistry and surgical apparatus which are infected by HIV,AIDS can enter into a healthy persons body.The preventive method s ofAIDS should be taken by us .1.To prevent the free mixing of men and women.2.The blood should be examined befor transfuring into a body.3.The niddle,syring,dental apparatus should be purified.4 .To follow the religious rules.

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