HIV
HIV means Human Immunuedifficiency Virus. It is a lentivirus a subgroup of retrovirus, that causes HIV infection and with progressing of time causes AIDS.
AIDS is a condition in human body that causes progressively the failure of immune system and allow and propagate the opportunistic infection and cancer.
HIV virus infects the major and principle cell of immune system, such as helper T-cell, macrophages and dendritic cell.