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. 2021 May 17;101(2):115432. doi: 10.1016/j.diagmicrobio.2021.115432

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Fig 4 — Diagnostic accuracy utilising pooled testing strategy: The size of the bubble depicts pool size, while the different colours code for different studies. The purple-shaded area represents areas with sensitivity and specificity combinations that meet the acceptable levels of Target Product Profile (TPP) put forth by WHO for COVID-19 diagnostics. The dashed square box within the purple-shaded area portrays the desirable level. Study bubbles clustered within the acceptable limits infer efficient diagnostic capability in detecting SARS-CoV-2 by pooling samples. (Colour version of figure is available online)