a close up of a model of a structure

HIV With Antibody 3D print of HIV surface protein gp120. An antibody also is attached at the top (green and blue). When antibodies stick to viruses, they may prevent or limit infection of host cells. For more information, visit the NIH 3D Print Exchange at 3dprint.nih.gov. Credit: NIH https://www.flickr.com/photos/niaid/14550544605/