Princeton researchers have developed a way to make a common biological test more than 3 million times more sensitive. The greatly increased performance of the test, called an immunoassay, could lead to much earlier detection of cancer, Alzheimer’s disease and other disorders. Immunoassays mimic the action of the immune system to detect the presence of biomarkers, the chemicals associated with diseases. The test produces a glow that can be measured in a laboratory, but sometimes the...
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