HIV infecting a T cell (image) University of Arizona Share Print E-Mail Caption HIV particles (yellow) infecting a T cell, viewed under a scanning electron microscope. T-cells perform important functions in our immune system. Credit NIH/NIAID Usage Restrictions This visual may only be used in conjunction of reporting/posting of this news release. Credit must be stated as indicated. Share Print E-Mail 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.