From 2020:
Results: The workflow reliably detects 2019-nCoV, and further discriminates 2019-nCoV from SARS-CoV. Through coordination between academic and public laboratories, we confirmed assay exclusivity based on 297 original clinical specimens containing a full spectrum of human respiratory viruses. Control material is made available through European Virus Archive – Global (EVAg), a European Union infrastructure project.
Conclusion: The present study demonstrates the enormous response capacity achieved through coordination of academic and public laboratories in national and European research networks.
Consensus, based on copy shown on various lab websites, appears to be that a normal PCR process is anywhere from 20 - 30 cycles. Going past 35 risks false positives. The workflow recommends a PCR process with 45 cycles.
If you want a casedemic, this is one way to do it.