title: Adventitious viruses and smallpox vaccine.
authors.forename: Claude
authors.initials: C
authors.lastname: Chastel
mesh_terms: D000818:Animals; D023482:Bioterrorism; D002417:Cattle; D004340:Drug Contamination; D006801:Humans; D017589:Immunization Programs; D010285:Pseudocowpox Virus / Q000302:isolation & purification*; D012899:Smallpox / Q000517:prevention & control; D012900:Smallpox Vaccine
chemical_list: D012900:Smallpox Vaccine