Fig. 3From: Assessing the comparability of cycle threshold values derived from five external quality assessment rounds for omicron nucleic acid testingThe Ct values derived from EQA samples were detected by different PCR instruments. a The Ct values determined by Tianlong nucleic extraction kit and BioGerm RT-PCR kit combined with different PCR instruments, b the Ct values determined by Zybio nucleic acid extraction kit and BioGerm RT-PCR kit combined with different PCR instrumentsBack to article page