Vaccinia virusVacciniaViral ProteinsVirus ReplicationPoxviridaeGenes, ViralVariola virusCowpox virusSmallpoxRNA VirusesSmallpox VaccineCell LinePoxviridae InfectionsVirus AssemblyMolecular Sequence DataVirus CultivationVaccines, SyntheticHeLa CellsDNA, ViralReceptors, VirusViral Plaque AssayCercopithecus aethiopsFowlpox virusAntigens, ViralGenetic VectorsOrthopoxvirusVirus SheddingDefective VirusesVirus DiseasesVirion