Volta

Comparative performance of COVID-19 Test Methods in Healthcare Workers during the Omicron Wave

Abstract Introduction The COVID-19 pandemic presents unique requirements for accessible, reliable testing, and many testing platforms and sampling techniques have been developed. However, not all test methods have been systematically compared to each other or a common gold standard, and the performance of tests developed in the early epidemic have not been consistently re-evaluated in the context of newly emerging SARS-CoV-2 variants. Methods We conducted a repeated measures study with adult healthcare workers presenting for SARS-CoV-2 testing. Participants were tested using seven test modalities: PCR with samples from the nasopharynx, oropharynx, and saliva; and BinaxNOW and iHealth antigen–based rapid detection tests (AgRDT) sampling the oropharynx and the nares. Test sensitivity was compared using any positive PCR test as the gold …

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