Nat. Immunol. 18, 225–235 (2017); published online 26 December 2016; corrected after print 23 January 2017

In the version of this article initially published, the fifth author's surname was spelled incorrectly (as 'Sarrami-Fooroshani'). The correct spelling is 'Sarrami-Forooshani'. Also, the cells for the third plot in Figure 1d were identified incorrectly as 'Intesrinal DCs'. The correct label is 'Intestinal DCs'. The errors have been corrected in the PDF and HTML versions of this article.