"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 patients viral load. Where test results do not correspond with the clinical presentation, a new specimen should be taken and retested using the same or different NAT technology." 13 January 2021
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And poof - cases world wide begin dropping as second tests confirm - false positives have been fueling the pandemic numbers.