Hutchinson, H D Differentiation of variola, monkeypox, and vaccinia antisera by radioimmunoassay. [electronic resource] - Bulletin of the World Health Organization 1977 - 613-23 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0042-9686 Subjects--Topical Terms: Antigens, ViralImmune Sera--analysisMonkeypox virus--immunologyPoxviridae--immunologyRadioimmunoassayVaccinia virus--immunologyVariola virus--immunology