Enquist Video (VIDEO) Princeton University This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Princeton University research suggests that a common strain of herpes virus causes cold sores with only one or two viral particles, resulting in a bottleneck in which the infection is more vulnerable to medical treatment. Viral particles (red dots) move along the narrow interior of a nerve cell, which looks like a black line near the top of the screen. A single viral particle exits the nerve cell and moves down toward a cell, enters it and begins replicating to create millions of copies of the viral particle that turn the entire cell red. Credit Video courtesy of Matthew Taylor 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.