Correction to: Nature Microbiology https://doi.org/10.1038/s41564-019-0578-3, published online 14 October 2019.

In the version of this Letter originally published, in the key in Fig. 4b the red squares were mistakenly labelled B6.Sst1S Il1rn–/–; they should have been labelled B6.Sst1S Il1rn+/+. This has now been corrected.