Infectious Agent Virus Sufficient SCDO:0001234 MESH:D014780 Minute infectious agents whose genomes are composed of DNA or RNA, but not both. They are characterized by a lack of independent metabolism and the inability to replicate outside living host cells. Viruses http://purl.bioontology.org/ontology/MESH/D014780 Add sub-classes: Hepatitis C Virus (term in NCIT) Hepatitis B Virus (term not found in other ontologies)