In the version of this article initially published, authors Katja Hoschler, Tim Brooks, Stephen Taylor and Jacqueline Hewson were omitted from the author list, and their contributions were omitted from the Author Contribution statement. Their contributions (initials in bold) are as follows: “F.A., Z.A.-C., K.H., L.S., R.B., E.L., S.A., B.P., A.H., G.A., K.B., M.R. and S.L. devised, set up and recruited the ESCAPE cohort. T.B., S.T., J.H. and B.H. performed humoral analyses.” Also, the following sentence was omitted from the beginning of the Acknowledgements: “The authors would like to thank the staff in the Virus Reference Division at PHE Colindale, who provided testing and contributed to antibody assay development.” The errors have been corrected in the HTML and PDF versions of the article..