Correction to: Nature https://doi.org/10.1038/s41586-021-03239-2Published online 17 February 2021

In Fig. 3c of this Article, the column labels were inadvertently the wrong way round, and should be labelled ‘NP-low’ on the left and ‘NP-high’ on the right. In the legend for Extended Data Fig. 5i, ‘by a, b’ should be ‘by c, d’, and in the legend for Extended Data Fig. 5j, ‘by c, d’ should be ‘by f, g’, so that the legends read as follows: ‘i, Durations of contacts between TFH cells and wild-type or DKO B cells in GCs, as measured in intravital imaging sessions represented by c, d and Supplementary Videos 5, 6. j, Durations of contacts between wild-type or CCR4KO TFH cells and MD4 B cells in GCs, as measured in intravital imaging sessions represented by f, g and Supplementary Videos 7, 8’. In addition, there were some minor typographical errors in Extended Data Fig. 4c. The original Article has been corrected online.