title: Titration method for an ointment type smallpox vaccine in embryonated chicken eggs.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D005612:Freeze Drying; D008722:Methods; D009824:Ointments; D012900:Smallpox Vaccine / Q000032:analysis / Q000592:standards; D014616:Vaccinia virus
chemical_list: D009824:Ointments; D012900:Smallpox Vaccine