"HIV/AIDS" . "IARC Group 2B carcinogens" . "Leukocytes" . "Discovery and invention controversies" . "Sexually transmitted diseases and infections" . "Immunology" . "Human cells" . "Immune system" . "1983 in biology" . "Causes of death" . "Lentiviruses" . "Blood" . "Blood cells" . "Neurology" .