An attack can be with a virus.Logical formLearned from20 sentences. A virus may cause aids.Logical formLearned from20 sentences. A virus can be h5n1.Logical formLearned from20 sentences. A virus may undergo a production.Logical formLearned from20 sentences. Persons may die from a virus.Logical formLearned from20 sentences. A virus may continue a spread.Logical formLearned from20 sentences. A virus may be suspected in some deaths.Logical formLearned from20 sentences. A doctor may be accused of infecting hundreds of children.Logical formLearned from20 sentences. A virus may spread in a continent.Logical formLearned from20 sentences. A virus may undergo a contraction.Logical formLearned from20 sentences. A virus may spread to persons.Logical formLearned from20 sentences. A (pneumonia virus) can be mysterious.Logical formLearned from20 sentences. Some hemophiliacs may be infected with a virus.Logical formLearned from20 sentences. An (influenza virus) can be seasonal.Logical formLearned from19 sentences. A virus can be in days.Logical formLearned from19 sentences.