Correction to: Nature Genetics https://doi.org/10.1038/s41588-021-00991-z, published online 3 February 2022.

In the version of the article initially published, the descriptions of two FUT2 genotypes were inverted. In Fig. 4c and Extended Data Fig. 7b and their legends, “rs601338:GG/GA” and “rs601338:AA” previously read “rs601338:AG/AA” and “rs601338:GG”, respectively. In the “Prediction of ABO blood groups and secretor status” section of Methods, the phrase “… where GG or GA genotypes are secretors and AA genotypes are nonsecretors” has been corrected from “where AA or AG … GG … ”. These changes have been made in the HTML and PDF versions of the article.