Niharika Thapa
Abstract
HIV (Human immunodeficiency virus) is a subclass of retroviruses that causes the infection and supplementary AIDS. Acquired immunodeficiency syndrome (AIDS) is a syndrome alters the immune system and its illness make humans prone to the opportunistic infections and cancer. HIV Infection can occur by Sexual contact, blood transfusion and contaminated or pre sterilized needles. HIV is basically asymptomatic before it reached to the most critical stage of HIV infection i.e AIDS. Studies represent that HIV may rise from apes to human in late 1800s. Without treatment a person can survive around 8 to 11 years depending upon the type of HIV subtypes.