Cases may pertain-to a (bird flu virus).Logical formLearned from34 sentences. An avian-flu virus can be deadly.Logical formLearned from34 sentences. A virus may undergo a containment.Logical formLearned from34 sentences. Blood may be contaminated with a virus.Logical formLearned from34 sentences. A virus may emerge in a country.Logical formLearned from34 sentences. A virus may be infected.Logical formLearned from34 sentences. A (virus strain) can be deadly.Logical formLearned from34 sentences. A (bird flu virus) can be a strain.Logical formLearned from34 sentences. A virus can be unknown.Logical formLearned from34 sentences. Deaths can be from a virus.Logical formLearned from34 sentences. Some percent of adults may be infected with a virus.Logical formLearned from33 sentences. Virus may undergo a production.Logical formLearned from33 sentences. A virus can be dormant.Logical formLearned from33 sentences. A virus can be synthetic.Logical formLearned from33 sentences. A virus can be complex.Logical formLearned from33 sentences.