CityU smart mask (IMAGE) City University of Hong Kong Caption City University of Hong Kong’s smart mask will help improve personal and public health. Credit City University of Hong Kong Usage Restrictions Image must be used with appropriate caption and credit. 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.