Social Distance Flow (IMAGE) American Physical Society Caption Simulation of pedestrian counterflow (red and pink particles) confined within a hallway (blue boundary), under conditions of weak social distancing. Credit Kelby Kramer and Gerald J. Wang Usage Restrictions Credit required. 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.