Epithelial Cell Structure (IMAGE) Albert Einstein College of Medicine Caption Tight junctions between genital tract epithelial cells provide an anatomic barrier and prevent HIV from reaching submucosal targets. Microbicides that disrupt the barrier increase the risk for HIV infection. This assay may help in predicting the safety of microbicides. Credit Albert Einstein College of Medicine Usage Restrictions None License Licensed 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.