Correction to: Nature Immunology https://doi.org/10.1038/s41590-018-0141-z (2018), published online 18 June 2018.

In the version of this article initially published, a word (“neutraling”) in sentence 2 of paragraph 5 was incorrect. The correct phrase is “...neutralizing properties...”. The error has been corrected in the HTML and PDF version of the article.