Maximum likelihood phylogenies of source and recipient’s viral populations in the different compartments. Sequences from recipient are red, sequences from source are blue. Full dots show SGS sequences from blood plasma RNA, squares show clonal sequences from PBMC DNA, diamonds show clonal sequences from seminal plasma RNA, triangles show sequences from seminal cells DNA. Empty dots display a representative sample of UDS reads. Grey shadow shows the seminal plasma cluster, which is not the origin of the transmitted virus