Artificial Respiratory Droplets (IMAGE) DOE/Pacific Northwest National Laboratory Caption Scientists used cow mucus and an algae-based compound to create droplets similar to the respiratory droplets that allow coronavirus transmission. Credit Animation by Sara Levine | Pacific Northwest National Laboratory Usage Restrictions No restrictions. License Public Domain 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.