Virology Select Cell Volume 141, Issue 2, (April 2010)   Cell  Volume 141, Issue 2, (April 2010) DOI: 10.1016/j.cell.2010.04.003 Copyright © 2010 Terms and Conditions

HA (grey) of the H1N1 flu virus from pandemic (left) and seasonal (right) strains, with sites for antibody binding (red) and glycosylation (blue). Image courtesy of J. Boyington and G. Nabel. Cell 2010 141, DOI: (10.1016/j.cell.2010.04.003) Copyright © 2010 Terms and Conditions

Antibody (red, yellow) from an individual who survived the 1918 Spanish flu bound to the HA (blue, grey) of the 1918 H1N1 virus. Image courtesy of D. Ekiert. Cell 2010 141, DOI: (10.1016/j.cell.2010.04.003) Copyright © 2010 Terms and Conditions

A HIV-1 virion trapped at the host cell surface by tetherin A HIV-1 virion trapped at the host cell surface by tetherin. Image courtesy of W. Weissenhorn. Cell 2010 141, DOI: (10.1016/j.cell.2010.04.003) Copyright © 2010 Terms and Conditions