Correction to: Nature Medicine https://doi.org/10.1038/s41591-025-03868-4, published online 8 August 2025.

In the version of the article initially published, in the “Early-life serological profiles” section, the text “…two or more antigens of greater than 0.5 log10 RLU ml−1” should have read “…two or more antigens or greater than 0.5 log10 RLU ml−1”. Additionally, in the “M/emm type-specific IgG measurement in a multiplex assay” section of the Methods, the sentence “Microspheres were conjugated to streptavidin-coupled MagPlex beads…” has been corrected to “Biotinylated peptides were conjugated to streptavidin-coupled MagPlex beads…”. These corrections have been made to the HTML and PDF versions of the article.