Pairwise diversity comparison between recipient and donor antiviral repertoires from pre-HCT through 1 year following transplant. Higher β-distance represents greater dissimilarity between the repertoire of the donor and recipient at any time point (n = 37). Recipient repertoires become more similar to the donor until d100 (β = 0.381) and then once again diverge by d365 (β = 0.407); pre-HCT recipient and d365 comparisons with donor were not different. The mean β-distance between recipient pre-HCT samples and d365 samples was 0.321, meaning that 1 year after HCT, the antiviral repertoire is significantly more similar to pre-HCT self than that of the donor (P < .001; see text), as modeled with an LME model. pre-tx, pretransplant.