(Bird flu) may be killed.Logical formLearned from21 sentences. A flu can be a strain.Logical formLearned from21 sentences. Avian influenza may be knowned as (bird flu).Logical formLearned from21 sentences. An avian flu can be pathogenic.Logical formLearned from21 sentences. (Flu vaccinations) can be annual.Logical formLearned from21 sentences. A person may hate a flu.Logical formLearned from21 sentences. A machine may detect an outbreak of (bird flu).Logical formLearned from21 sentences. (Flu shots) can be yearly.Logical formLearned from21 sentences. Concerns can be about flu.Logical formLearned from21 sentences. (Bird flu) may remain hard.Logical formLearned from21 sentences. Strains can be constituted-of-or-filled-with avian flu.Logical formLearned from21 sentences. A female may suffer from flu.Logical formLearned from21 sentences. (Health authorities) may confirm some cases of flu.Logical formLearned from21 sentences. A (flu virus) may emerge.Logical formLearned from21 sentences. A country may be hited by (bird flu).Logical formLearned from21 sentences.