title: Studies on viability of Variola virus. I. Viability of Variola virus in smallpox material on glass slides, in capillary tubes on filter paper and cotton threads.
mesh_terms: D005898:Glass; D003368:Gossypium; D010209:Paper; D011309:Preservation, Biological; D013048:Specimen Handling; D012901:Variola virus / Q000254:growth & development*