Normal breathing without a mask (VIDEO) American Institute of Physics 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 Animation video of the instantaneous simulation results of saliva plume concentration contours (in volume fraction) during normal breathing shown on the sagittal plane without wearing a mask. Considering a threshold of 1 part per million, saliva concentrations below 10-6 are cut off. Credit Ali Khosronejad Usage Restrictions Journalists may use this video only with appropriate credit. 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.