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. 2021 Aug 31;1185:339002. doi: 10.1016/j.aca.2021.339002

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Fig. 8 — Image showing the results for the cross-reactivity testing with related coronaviruses, MERS-CoV and HCoV-NL63 along with positive and negative controls using the capillary method. Images in A and B are for the capillaries before and after performing the LAMP assay. A colour change from dark pink to orange/yellow indicates the presence of the SARS-CoV-2 virus, whereas no change in colour indicates the absence of the virus. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)