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. 2016 Feb;22(2):217–223. doi: 10.3201/eid2202.151250

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Percent survival among 151 patients in the Ebola virus disease (EVD) primary cohort by cycle threshold (C_t) rounded to nearest integer, Bo District, Sierra Leone, September 2014–January 2015. Locally weighted smoothing line and 95% uncertainty intervals added to illustrate trend. The area of each dot is scaled to represent the number of confirmed EVD cases, by C_t. The trend line suggests a sharp increase in survival for patients with C_t values in the mid-20s (dotted line).