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Nov. 17th, 2020 01:58 pm"However, in an article published in Clinical Infectious Diseases, Bullard et al reported that patients could not be contagious with Ct >25 as the virus is not detected in culture above this value...
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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.
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https://academic.oup.com/cid/advance-article/doi/10.1093/cid/ciaa1491/5912603
Portuguese Appeals Court Deems PCR tests unreliable
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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
Portuguese Appeals Court Deems PCR tests unreliable
