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. 2022 Jul 12;122:930–935. doi: 10.1016/j.ijid.2022.07.022

Figure 1.

Figure 1

Linearity evaluation using QIAstat-Dx® Respiratory SARS-CoV-2 cartridges. a) Clinical sample 1 representing ancestral lineage, b) Clinical sample 2 representing alpha lineage, c) WHO international standard. Ct: cycle threshold; WHO: World Health Organization.