What does limit quantification of 0.0069% mean?
Limit of quantification means the limit of reporting, which for your lab is -4.5 logs. But most PCR equipment/reagents can detect far below that, probably to -7 logs. So "limit of quantification" actually means the point at which the results are truncated and no longer reported due to false positives concerns, so it is not a limit of detection. The limit of quantification is a mixture of how low the PCR can detect tempered by where the reporting should be cut off since false positives rise exponentially below about -4.5 logs.
PCRs were not invented to detect leukemia in people. They were invented to detect bacteria in foods. Think of it that way and you will no longer be tempted to expect such surgical precision from these tests.
Edited by Trey, 08 June 2017 - 07:55 PM.