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  • Frequent COVID-19 testing key to efficient, early detection, study finds

    An Illinois student provides a saliva sample for a COVID-19 test.

    COVID-19 testing works best when administered multiple times per week as part of a routine screening program, such as the SHIELD Illinois saliva-testing protocol, a new study found. 

    Photo by Fred Zwicky


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  • Editor’s notes: To reach Christopher Brooke, email To reach Rebecca Smith, email

    The paper “Longitudinal assessment of diagnostic test performance over the course of acute SARS-CoV-2 infection” is available online. DOI:10.1093/jid/jiab337