Infection with the human immunodeficiency virus (HIV) and acquired immunodeficiency syndrome (HIV/AIDS) is a group of diseases caused by the retrovirus human immunodeficiency virus (HIV). After initial infection, a person may experience no symptoms or a brief period of influenza-like illness. This is usually followed by a long period of no symphony.
The indications of HIV disease can shift in type and seriousness from individual to individual, and a few groups might not have any manifestations for a long time.
The stages beneath portray how HIV disease advances in the body in case it is left untreated. Without antiretroviral treatment for HIV, the infection repeats in the body and makes increasingly more harm the invulnerable framework.