Immune reconstitution in treated patients. (A) Loess regression curves demonstrating T-cell subset reconstitution in patients with seropositive CMV (green) and those who were treated with letermovir (letermovir, red) or were not treated with letermovir (blue); (B) CD3⁺CD4⁻CD8⁺ specific immune reconstitution in patients with seropositive CMV treated with letermovir who had csCMVi after letermovir withdrawal vs those who did not have csCMVi after letermovir withdrawal.