Correction to: Nature Immunology https://doi.org/10.1038/s41590-020-00824-x, published online 21 December 2020.

In the version of this article initially published, the affiliations for authors Cara Ellison, Venizelos Papayannopoulos, David C. Thomas and Felix Randow were incorrect. The error has been corrected in the PDF and HTML versions of the article.