Source:http://linkedlifedata.com/resource/umls/id/C0042216
MSH: The type species of ORTHOPOXVIRUS, related to COWPOX VIRUS, but whose true origin is unknown. It has been used as a live vaccine against SMALLPOX. It is also used as a vector for inserting foreign DNA into animals. Rabbitpox virus is a subspecies of VACCINIA VIRUS.,CSP: does not occur in nature, propagated in the laboratory for use as an active vaccine against smallpox; possibly a derivative or recombinant of cowpox or smallpox viruses; used experimentally as a vector for genes expressing foreign protein antigens.,NCI: DNA viruses used in several biotechnology applications, including expression vector systems. (from On-line Medical Dictionary)