A male may suffer some bouts of flu.Logical formLearned from11 sentences. A delay can be in (flu vaccine).Logical formLearned from11 sentences. A (bird flu) can be in a world-city.Logical formLearned from11 sentences. A flu may kill some persons.Logical formLearned from11 sentences. Fears can be about a severity of flu.Logical formLearned from11 sentences. Death can be from flu.Logical formLearned from11 sentences. A (flu pandemic) may come after an outbreak of a strain.Logical formLearned from11 sentences. Flu can be in cases.Logical formLearned from11 sentences. A flu may break_out.Logical formLearned from11 sentences. Citizens may be stranded by a (flu crisis).Logical formLearned from11 sentences. Patients can be sick with an (avian flu).Logical formLearned from11 sentences. Passengers can be with (flu symptoms).Logical formLearned from11 sentences. Persons may look for cases of flu.Logical formLearned from11 sentences. A (mass vaccination campaign) may use (flu vaccines).Logical formLearned from11 sentences. A precaution can be against flu.Logical formLearned from11 sentences.