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Faster and cheaper COVID-19 testing using pencil lead
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Faster and cheaper COVID-19 testing using pencil lead

by Melissa Pappas,  University of Pennsylvania Credit: University of Pennsylvania Testing is key to understanding and controlling the spread of COVID-19, which has already taken more than four million lives around the world. However, current tests are limited by the tradeoff between accuracy and the time it takes to analyze a sample. Another challenge of current...