title: Laboratory aids to the control of smallpox in countries where the disease is not endemic.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D004196:Disease Outbreaks / Q000517:prevention & control; D006801:Humans; D007757:Laboratory Infection / Q000517:prevention & control; D008854:Microscopy, Electron; D012899:Smallpox / Q000175:diagnosis* / Q000517:prevention & control*; D014195:Travel; D012901:Variola virus / Q000302:isolation & purification; D014776:Virus Cultivation