The zCancer scan targets the area around the BX frequency.
The High Freq Cancer Scan targets the area around the BX frequency which is 4 octaves higher per the British Rife Research Group's report.
They don't overlap by design. However, they share the same goal only in different ranges.
The Full System scan will cover both, but yet again from a different octave (frequency range).
It is always best to hit a pathogen at their primary frequency, rather than at a resonate frequency.
The Full System scan is looking to also target all other issues which most likely reside in this range.
By adding the other two scans, you increase your chances of adding those frequencies that resonate targets better in these ranges.
For more details, please check the link: