CityU smart mask with flexible senor (IMAGE) City University of Hong Kong Caption The flexible sensor can be used to detect human respiratory activity by integrating it with commercial masks. 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.