The recommended number of amplification cycles for COVID rtPCR tests is 25-30, but virtually every lab on the planet has been running 40+ cycles. With the proper test kit and enough amplification cycles, you can obtain a false positive result for anything you want, which is why rtPCR kits are not appropriate and are not supposed to be used for diagnosing clinical infections. It's also the entire reason that rtPCR tests are the only method that has been used for diagnosing clinical COVID infections throughout this entire scamdemic.