(IMAGE) ICFO-The Institute of Photonic Sciences Caption Caption: Alfredo Ongaro preparing the device in the Optoelectronics lab to then take it to the Biology lab at ICFO for the testing of the saliva samples. Credit ©ICFO Usage Restrictions Credit must be given to the creator. No derivatives or adaptations of the work are permitted. License CC BY-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.