Many contagious diseases such as Covid19 can induce high temperatures and fever in a significant number of affected individuals. Contact tracing of such individuals and analysis of their behaviour and interactions with others and their environment can be a useful tool to contain spread of contagious diseases. A key component of ProCam is an innovative camera that combines infrared/thermal and visible light sensors while securing the visible light images. Privacy-preserving camera systems are important as more and more people are concerned about the ethics of massive surveillance and invasion of privacy. ProCam solves this by using a cryptographic tool to hide the visible light images, only allowing to retrieve identites with the use of cryptographic keys.