1.INTRODUCTION         In June 1981, the centers for The Disease Control of the United States reported that five young homosexual men in the Los Angels area had contracted Pneumocystis Carinii pneumonia( a kind of pneumonia that is particularly found in AIDS patient). 2 of the patients had died. This report signalled the begninning of an epidemic of a viral disease characterized by immunosuppression associated with opportunistic infection( an infection caused by a microrganism that does not normally produce …showed first 75 words of 1009 total…

…showed last 75 words of 1009 total…a rapid decline in host defenses manifested by low CD4+ counts, is also recognized as full brown AIDS which include features of loss of weight, diarrhea, opportunistic infections, spectrum of bacterial infections, secondary neoplasm and neurologic involvement. With AIDS, the 5-year mortality rate is 85% and with longer intervals the rate approaches 100%. Anyone with HIV infections and CD4+ t-cell count less than 200 cells/ ul may also consider having AIDS even if no clinical features are present.