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X-Y (scatter) plots of the Ct values of the initial diagnostic testing against the Ct values of the repeat testing of the same 286 archived patient specimens. The two runs were performed on different days, by different operators, using different reaction mixes. The best fit lines for NP (A) and HA (B) gene target scatter plots were derived, with slopes/gradients of 0.9806 and 0.9341, respectively.
