michael HIV vaccine (IMAGE) Johns Hopkins Medicine Caption Background image is a scanning electron micrograph showing HIV particles (yellow) attacking a human immune cell (blue). Credit Graphic created by M.E. Newman, Johns Hopkins Medicine, using public domain images, including HIV and T cell photo courtesy of the National Institute of Allergy and Infectious Diseases, National Institutes of Health Usage Restrictions -- 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.