WHO Information Notice for IVD Users 2020/05 – WHO

Note: The WHO acknowledges the problems of false positives due to inappropriate cycle threshold used in PCR testing. WHO guidance Diagnostic testing for SARS-CoV-2 states that careful interpretation of weak positive results is needed (1). The cycle threshold (Ct) needed to detect virus is inversely proportional to the patient’s viral load. Where test results do not correspond with […]

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