SpyCage image (IMAGE) Penn State Caption Researchers have demonstrated proof-of-principle of a protein-based intranasal vaccine platform, called SpyCage, that could eventually help to prevent infection and transmission of respiratory viruses, like SARS-CoV-2. Image shows an illustration of the SpyCage vaccine platform, on right, decorated with a portion of the spike protein from SARS-CoV-2, next to an illustration of the virus. Credit Dani Zemba, Penn State Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.