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Saliva-based COVID Tests in Schools

Dr. Rebecca Lee Smith, a University of Illinois infectious disease epidemiologist, developed the studies that earned their test its emergency authorization. She said PCR tests are not only reliable, but very sensitive. And they’re better early-warning indicators of infection. “Our data show that saliva is one of the best ways to find people early because the virus replicates in saliva before it moves to the nasal tissues,” she said.