A (flu pandemic) may undergo an event.Logical formLearned from95 sentences. Strains can be constituted-of-or-filled-with (bird flu).Logical formLearned from95 sentences. A (bird flu) can be pathogenic.Logical formLearned from95 sentences. A (bird flu outbreak) may pertain-to a country.Logical formLearned from95 sentences. (Bird flu patients) can be suspected.Logical formLearned from95 sentences. Some cases can be constituted-of-or-filled-with (bird flu infections).Logical formLearned from93 sentences. Outbreaks can be constituted-of-or-filled-with avian flu.Logical formLearned from90 sentences. A male may come_down with a flu.Logical formLearned from89 sentences. (Flu outbreaks) can be in a country.Logical formLearned from88 sentences. A flu may spread.Logical formLearned from88 sentences. An outbreak may pertain-to a (bird flu).Logical formLearned from88 sentences. A spread may pertain-to a flu.Logical formLearned from87 sentences. A (bird flu outbreak) can be reported.Logical formLearned from86 sentences. A strain of (bird flu) may kill some persons.Logical formLearned from85 sentences. A country may confirm some cases of flu.Logical formLearned from84 sentences.