Editorial Expression of Concern: SARS-CoV-2 detection using a nanobody-functionalized voltammetric device

The Editor would like to alert the readers that concerns have been raised regarding some of the data presented in this article and its supplementary materials, including low data variability and discrepancies between the plots presented in the Figures and the source data, specifically: The data presented in Fig. 2E for Au-PEG 6 -VHH-72-C13 and Fig. 4A 1.2 nM RBD as well as the associated values in the source data files appear highly similar; The data presented in Figs.2E and 4A appear to have unusually low variability between groups; The data presented in Figs.5D, 6C, 6D and 7C appear to differ from the source data.