Correction to: Nature Biotechnology https://doi.org/10.1038/s41587-019-0275-z, published online 2 October 2019.

In the version of this article initially published, the affiliation for Eugene V. Koonin was given in Table 2 as Korea Centers for Disease Control & Prevention. The correct affiliation is US National Center for Biotechnology Information, National Institutes of Health. The error has been corrected in the HTML and PDF versions of the article.