Correction to: Nature Microbiology https://doi.org/10.1038/s41564-022-01078-z, published online 4 March 2022.

In the version of this article initially published online, in the header paragraph now starting “Contractile injection systems are nanomachines used by bacteria to puncture target cell membranes, thereby mediating bacterial competition and infection of eukaryotic cells,” bacterial competition was omitted. It has now been restored in the HTML and PDF versions of the article.