title: Biosafety in the balance.
mesh_terms: D000818:Animals; D000881:Anthrax / Q000382:microbiology / Q000635:transmission; D001408:Bacillus anthracis / Q000302:isolation & purification*; D055885:Biohazard Release / Q000517:prevention & control; D001717:Birds / Q000821:virology; D002487:Centers for Disease Control and Prevention, U.S.; D005289:Ferrets / Q000821:virology; D005818:Genetic Engineering; D006801:Humans; D053124:Influenza A Virus, H5N1 Subtype / Q000235:genetics / Q000302:isolation & purification* / Q000472:pathogenicity; D007251:Influenza, Human / Q000235:genetics / Q000635:transmission / Q000821:virology*; D018570:Risk Assessment; D014481:United States; D012901:Variola virus / Q000302:isolation & purification