Lung tissue and SARS-CoV-2 spike protein (IMAGE) Experimental Biology Caption Using a newly developed mouse model, researchers found that exposure to the SARS-CoV-2 spike protein alone was enough to induce COVID-19-like symptoms including severe inflammation in the lungs. The left images show healthy mouse lung tissue while the right images show tissue from mouse lungs exposed to the spike protein. Credit Pavel Solopov, Old Dominion University 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.