Core Viewpoint - A new wearable medical monitoring device named CircTrek has been developed by a team at the Massachusetts Institute of Technology, capable of real-time detection of individual cells flowing in blood vessels, enhancing the efficiency of early disease diagnosis, recurrence monitoring, infection risk assessment, and treatment effect tracking [1]. Group 1 - The CircTrek device is the size of a smartwatch [1]. - The device allows for continuous monitoring of circulating cells in the human body [1]. - The research findings have been published in the latest issue of the journal "Biosensors" [1].