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PURPOSE OF REVIEW: SARS-CoV-2 is the novel human coronavirus responsible for the COVID19 pandemic. Accurate detection of infection with SARS-CoV-2 is an essential component of efforts to treat individual patients and to contain spread of the virus in the community. The purpose of this review is to describe current diagnostic modalities for SARS-CoV-2 and outline their use. Special considerations for pediatric age groups are included. RECENT FINDINGS: RNA PCR from the upper respiratory tract remains the gold standard for detection of infection with SARS-CoV-2. Antigen testing is being widely deployed as a faster and more convenient alternative to PCR, but is less sensitive and should only be used for diagnosis early after symptom onset. Serologic assays can document prior infection and are helpful in diagnosing multisystem inflammatory syndrome in children. Serologic testing should not be used to diagnose acute or active infection. Immune assays are likely to provide a useful measure of protection against COVID19 in the future as knowledge of protective responses improves. SUMMARY: A variety of SARS-CoV-2 diagnostics have recently been developed and deployed. Clinicians should understand the appropriate use and interpretation of RNA PCR, antigen testing and immune assays for SARS-CoV-2 in order to diagnose and treat patients in this evolving pandemic.
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Diagnostic testing for SARS-CoV-2/COVID19
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