Risks of vaping (IMAGE) Johns Hopkins University Caption Researchers found thousands of unknown chemicals in the e-liquid, and the number of compounds increased significantly in the aerosol. Credit Will Kirk/Johns Hopkins University Usage Restrictions None License Original 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.