Nasal biomarker testing to rule out viral respiratory infection and triage samples: a test performance study.

While further work will be needed to determine whether persistent virus detection by PCR is clinically significant for other viruses, evidence to date suggests that persistent low-positive PCR tests during resolving infections may not be significant for infection control. 27 In addition to the specific findings, the outlier analysis done here demonstrates the benefits leveraging large scale EHR data to reveal subtle unappreciated associations difficult to discern by conventional approaches, which can then be prospectively evaluated in subsequent studies.

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