Coronavirus: This smart helmet can screen 200 people in 60 second How helpful and convenient would it be if one could learn about an impending bout of COVID-19 even before they could develop noticeable symptoms? Making such a scenario a reality, a new study has reported that a smart ring—that collects temperature data of the wearer—can be used to detect the outset of a fever, which is one of the most common symptoms of the SARS-CoV-2 coronavirus infection. According to researchers from the University of California-San Diego, UC San Francisco, and MIT Lincoln Lab, the device can be more efficient at recognizing illness than a thermometer. This can in turn aid in earlier isolation and testing, and lead to the restriction of the disease's spread, suggested the proof-of-concept effort.