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Our results provide our customers with bilingual detailed interpretation notes, advice, disclaimers and instructions. Please see the result for answers to...

  Cycle threshold (CT) is a numerical value generated during a Covid-19 RT-PCR test. Put simply, the CT value refers to the number of cycles that a sampl...

Diag is responsible for fully reporting Covid-19 test results to the Centers for Disease Control (CDC) and updating them on the PC-Covid application via the...

Covid-19 RT-PCR tests are performed at Diag’s central laboratory.

Diag’s current turnaround time for Covid RT-PCR tessts is within 18-22 hours from the time our central laboratory receives the sample. However, depending on...

Viral load can vary based on the type of specimen collected and how much specimen is collected. External variables can influence CT values, including specim...

Invalid result is returned when the quality of the sample was unqualified. Incorrect sampling time, taking too early (1-3 days) after exposure causes false ...

It is very difficult to predict why one lab has given positive results while other lab gave negative results. The discrepancy is based on many factors: Ti...

Covid-19 RT-PCR tests at Diag will use nasal samples in adults and oropharyngeal samples in children.

All cut off standards for CT value are laboratory and kit specific. We at Diag use the most standard IVD and CE marked kits which have higher sensitivity an...