A country may report cases of (bird flu).Logical formLearned from16 sentences. A (flu pandemic) may pertain-to a world-city.Logical formLearned from16 sentences. A (flu shot) may pertain-to a year.Logical formLearned from16 sentences. A same time can be as a (flu shot).Logical formLearned from16 sentences. (Flu vaccines) can be annual.Logical formLearned from16 sentences. A person may catch a (flu bug).Logical formLearned from16 sentences. Protection can be from a flu.Logical formLearned from16 sentences. Some forms can be constituted-of-or-filled-with flu.Logical formLearned from16 sentences. A male may have a case of a flu.Logical formLearned from16 sentences. A (flu virus) may undergo a transmission.Logical formLearned from16 sentences. A severity may pertain-to a (flu season).Logical formLearned from16 sentences. Flu may undergo a complication.Logical formLearned from16 sentences. (Flu strains) can be within some hours.Logical formLearned from16 sentences. (Flu vaccine) may protect older persons from pneumonia.Logical formLearned from16 sentences. A flu may be gone.Logical formLearned from16 sentences.