A passage may pertain-to a virus.Logical formLearned from13 sentences. A team may isolate a virus.Logical formLearned from13 sentences. Fatalities can be from a virus.Logical formLearned from13 sentences. An (influenza virus) can be in a world-city.Logical formLearned from12 sentences. A person may die of a (flu virus).Logical formLearned from12 sentences. Someone may carry a virus.Logical formLearned from12 sentences. A country can be by a virus.Logical formLearned from12 sentences. A virus may undergo a (death toll).Logical formLearned from12 sentences. A country may be caused by a strain of a virus.Logical formLearned from12 sentences. Chickens may carry a virus.Logical formLearned from12 sentences. Specimen may be tested for (bird flu viruses).Logical formLearned from12 sentences. An appearance may pertain-to a virus.Logical formLearned from12 sentences. A (bird flu virus) may undergo a detection.Logical formLearned from12 sentences. Infections may be caused by a virus.Logical formLearned from12 sentences. Viruses may undergo a circulation.Logical formLearned from12 sentences.