<unk>  <unk>  (from cyto- 'cell' via Greek - 'container' + 'big, megalo-' + -virus via Latin 'poison') is a genus of viruses in the order Herpesvirales, in the family Herpesviridae, in the subfamily Betaherpesvirinae. Humans and monkeys serve as natural hosts. The 11 species in this genus include human betaherpesvirus 5 (HCMV, human<unk> , HHV-5), which is the species that infects humans. Diseases associated with HHV-5 include mononucleosis and pneumonia. In the medical literature, most mentions of<unk>  without further specification refer implicitly to human<unk> . Human<unk>  is the most studied of all<unk> es. MX2/MXB was identified as a restriction factor for herpesviruses, which acts at a very early stage of the replication cycle and MX2/MXB restriction of herpesvirus requires GTPase activity.
Cytomegalovirus
Epstein–Barr virus
Mumps virus
Human herpesvirus 6
Varicella zoster virus
Betatorquevirus
Herpes simplex virus
Rubella virus