Australia PHLN guidance, up to 45 cycles for PCR tests

From June 8, 2020, the Australian Government’s Public Health Laboratory Network (PHLN) put out guidance on Nucleic Acid Test Result Interpretation for SARS-CoV-2 in the laboratory.  They state that with PCR tests for SARS-CoV-2 “usually 35-45 cycles are undertaken”, and make the comment that over 40 can risk false positive.