An epicenter may pertain-to a (flu crisis).Logical formLearned from13 sentences. (Flu patients) can be confirmed.Logical formLearned from13 sentences. A focus may shift to a (bird flu virus).Logical formLearned from13 sentences. An increase can be in (bird flu cases).Logical formLearned from13 sentences. Countries may be affected by flu.Logical formLearned from13 sentences. Strains can be constituted-of-or-filled-with (flu virus).Logical formLearned from13 sentences. (Bird flu) can be between a month.Logical formLearned from13 sentences. Poultry may be infected with (bird flu).Logical formLearned from13 sentences. A threat may be posed by (bird flu).Logical formLearned from13 sentences. A conference can be on avian flu.Logical formLearned from13 sentences. (Bird flu) can be fatal.Logical formLearned from13 sentences. A (flu strain) can be pathogenic.Logical formLearned from13 sentences. (Flu strains) can be regular.Logical formLearned from13 sentences. Cases may pertain-to a (flu strain).Logical formLearned from13 sentences. A virus may precipitate a global (flu pandemic).Logical formLearned from13 sentences.