HIV Infecting Cell (IMAGE) University of California - San Diego Caption A colorized scanning electron micrograph depicts HIV particles (purple spheres) infecting a cell in the immune system. Credit Mark Ellisman and Tom Deerinck, NCMIR, UC San Diego Usage Restrictions Use photo 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.