New study: Viral load is not a true indicator of SARS-CoV-2 transmission risk (IMAGE)
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The cycle threshold (Ct) values of the spreaders and the nonspreaders are largely overlapping. A: Separation of index cases into spreader and nonspreader groups. The n of the cases in each population is indicated. Scatter plots of Ct values expressed as means ± SEM (B) or median ± interquartile intervals (C). D: Histogram of the distribution of Ct values. E: Cumulative frequency of Ct values. Dashed lines indicate the cumulated percentage of each population at the designated Ct value (24 or 32). At the indicated Ct value of ≤ 24, there is a higher percentage of spreader cases than nonspreader cases, although the differences are small. Ct values of the indicated populations are compared. Mann-Whitney U test (P > 0.05).
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The Journal of Molecular Diagnostics
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