A person may have (flu symptoms).Logical formLearned from20 sentences. Vaccines can be against (bird flu).Logical formLearned from20 sentences. A country may confirm an outbreak of a strain of (bird flu).Logical formLearned from20 sentences. A version may pertain-to a flu.Logical formLearned from20 sentences. A response can be to (bird flu).Logical formLearned from20 sentences. A (flu vaccine) may pertain-to a nation.Logical formLearned from20 sentences. A flu can be confirmed.Logical formLearned from20 sentences. Risk can be from flu.Logical formLearned from20 sentences. Patients can be with (flu symptoms).Logical formLearned from20 sentences. A result can be constituted-of-or-filled-with (bird flu).Logical formLearned from20 sentences. Fears can be over (bird flu).Logical formLearned from20 sentences. Concern can be over (bird flu).Logical formLearned from20 sentences. (Bird flu) may claim some lives.Logical formLearned from20 sentences. A flu can be strong.Logical formLearned from19 sentences. Some deaths can be from a flu.Logical formLearned from19 sentences.