Researchers have developed a noninvasive medical monitoring device that is capable of detecting single cells within blood vessels, yet is small enough to be worn like a wristwatch. One key feature of this wearable device is its ability to continuously monitor circulating cells in the human body. This technology, presented in npj Biosensing, has the potential to significantly enhance early disease diagnosis, monitor disease relapse, assess infection risk, and determine the effectiveness of treatments, among other medical applications.

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