AIDS virus. Computer artwork of a cutaway through a Human Immunodeficiency Virus (HIV). HIV causes AIDS (Acquired Immune Deficiency Syndrome), in which the immune system is attacked. The virus has a core containing two strands of RNA (ribonucleic acid, blue) which carry the viral genes. White spheres represent the enzyme reverse transcriptase which inserts the genes into the host. The RNA is enclosed in a protein coat made of repeating units called capsomeres (brown). Around this is a lipid bilayer membrane (red/green) which is studded with GP120 glycoproteins (yellow) that bind to target human white blood cells. The HIV virus attacks white blood cells and weakens the immune system.

Photo website with Rights Managed and Royalty Free stock photos, images, illustrations and footage available for download immediately for commercial and editorial uses. Aflo is a leading independent supplier and producer of stock pictures and visual content. Search and find high quality images and video for design, print, web-use and publishing. Buy photos from our extensive collection of model released and property released sports images. Search some of the most beautiful travel and landscape pictures from our own photographers and license from our large collection of content, modern and archive, focusing on Japan. We provide free research. Register for personal account management and for full use of our Stock Photography website and start to download images now.