title: ["Biological", but fatal. Letters as potential biological weapons].
authors.affiliation: ngo.schroeder@springer.de
authors.forename: I
authors.initials: I
authors.lastname: Schroeder
mesh_terms: D001424:Bacterial Infections / Q000401:mortality / Q000635:transmission*; D001694:Biological Warfare; D006801:Humans; D011177:Postal Service; D023481:Terrorism; D014777:Virus Diseases / Q000401:mortality / Q000635:transmission*