Source:http://linkedlifedata.com/resource/umls/id/C0037356
MSH: A species of ORTHOPOXVIRUS causing infections in humans. No infections have been reported since 1977 and the virus is now believed to be virtually extinct.,NCI: An orthopoxvirus that is the causative agent of smallpox.,CSP: species of orthopoxvirus causing infections in humans, virtually extinct in nature.