Nature Reviews Microbiology (2021) https://doi.org/10.1038/s41579-020-00501-8 Published online 25 January 2021.

In the original version of this article, the names of reviewers in the peer review information section were incorrect. It should have stated that Nature Reviews Microbiology thanks R. Fearns, M. Rosenthal and the other, anonymous, reviewer(s) for their contribution to the peer review of this work. The error has now been corrected online. We apologize to the readers for any confusion caused.