Source:http://linkedlifedata.com/resource/umls/id/C0018895
MSH: Viruses which enable defective viruses to replicate or to form a protein coat by complementing the missing gene function of the defective (satellite) virus. Helper and satellite may be of the same or different genus.,CSP: a virus which provides the factor(s) needed by a defective virus for replication; for certain plant virus complexes the term refers to the virus which confers insect transmissibility to the complex.