HIV vaccine (IMAGE) Scripps Research Institute Caption A structural depiction of two HIV nanoparticle vaccines (E2p and I3-01v9) and a close-up of the Env proteins these nanoparticles display on their surfaces (HIV-1 BG505 UFO trimer). The vaccines are designed to have shorter sugars (or glycans) on the Env protein. Credit Scripps Research Usage Restrictions With related coverage and credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.