Resource for PCR cycle thresholds for SARS-COV-2, which will help in your understanding of the conversation in the video:
“It can be observed that at Ct = 25, up to 70% of patients remain positive in culture and that at Ct = 30 this value drops to 20%. At Ct = 35, the value we used to report a positive result for PCR, <3% of cultures are positive.”
https://academic.oup.com/cid/advance-article/doi/10.1093/cid/ciaa1491/5912603
