A country may fight (bird flu).Logical formLearned from14 sentences. Countries may be hited by (bird flu).Logical formLearned from14 sentences. (Bird flu cases) may be reported.Logical formLearned from14 sentences. A (flu pandemic) can be in some years.Logical formLearned from14 sentences. A (flu outbreak) may pertain-to a language.Logical formLearned from14 sentences. Immunity can be to a flu.Logical formLearned from14 sentences. A flu can be a virus.Logical formLearned from14 sentences. A (bird flu virus) can be low-grade.Logical formLearned from14 sentences. A (bird flu vaccine) can be for humans.Logical formLearned from14 sentences. Kids may have a flu.Logical formLearned from14 sentences. A (flu virus) can be nasty.Logical formLearned from14 sentences. (Flu shots) may pertain-to persons.Logical formLearned from14 sentences. An outbreak of (bird flu) may be confirmed in a nation of a country.Logical formLearned from14 sentences. Flu may undergo a prevention.Logical formLearned from14 sentences. A person may have a (flu shot).Logical formLearned from14 sentences.