Infectome screening in HCT patients. (A) Relative genomic equivalents of Anelloviruses detected before transplant (preconditioning and transplant timepoints) and the 3 mo timepoint. (B) Relative genomic equivalents of human herpesviruses by timepoint. Error bars represent SEM. (C) Concordance between clinically validated BK PCR test (in blood) and BK cfDNA identification. (D) BK abundances in blood (PCR test, Top), plasma (cfDNA, Middle), and urine (PCR test, Bottom) in patient 031.