Correction to: Nature Methods https://doi.org/10.1038/s41592-019-0599-0, published online 27 September 2019.

In the version of this Research Highlight originally published, in the sentence beginning “They also mapped...” it was mistakenly stated that “the TCR–peptide interface for three sets of Norwalk-like virus (NLV)-specific T cells” was mapped. Instead, the sentence should have read: “They also mapped the critical residues in the TCR–peptide interface for three CMV-specific TCRs, and were able to show that T-scan can detect subtle differences in TCR specificity for low-affinity interactions.” This has now been amended in the online versions of the Research Highlight.