HIV or human immunodeficiency virus is a virus that attacks the bodys immune system. It is a member of genus Lentivirus, part of the family Retroviridae. If untreated HIV leads to AIDS (acquired immunodeficiency syndrome) a condition of progressive failure of the immune system. In most cases, HIV is a sexually transmitted infection and occurs by contact with or transfer of blood, pre-ejaculate, semen, and vaginal fluids. ..Read More