hiv | family | orthoretrovirinae <tsp> aids_(journal) | academicdiscipline | hiv <sep> the human immunodeficiency viruses (hiv) are two species of lentivirus (a subgroup of retrovirus) that infect humans over time, they cause acquired immunodeficiency syndrome (aids), a condition in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive without treatment, average survival time after infection with hiv is estimated to be 9 to 11 years, depending on the hiv subtypein most cases, hiv is a sexually transmitted infection and occurs by contact with or transfer of blood, pre-ejaculate, semen, and vaginal fluids non-sexual transmission can occur from an infected mother to her infant during pregnancy, during childbirth by exposure to her blood or vaginal fluid, and through breast milk within these bodily fluids, hiv is present as both free virus particles and virus within infected immune cells 
aids (journal) comes under the academic discipline hiv which belongs to the family orthoretrovirinae.hiv is a subgroup of retroviruses that infect humans