| Antiviral | EC50 ratio | Phenotype | Strain | Source | Marker | Assay | Reference |
|---|---|---|---|---|---|---|---|
| Letermovir | 3.20 | Intermediate level resistance | Laboratory strain | Recombinant | Details | A third component of the human cytomegalovirus terminase complex is involved in letermovir resistance. (Dec 2017) |