title: A long pause.
mesh_terms: D000818:Animals; D035843:Biomedical Research; D001717:Birds; D006801:Humans; D053124:Influenza A Virus, H5N1 Subtype / Q000235:genetics; D005585:Influenza in Birds / Q000635:transmission*
references: Fed Regist. 2012 Oct 5;77(194):61083-115
references: 23038847