A pandemic can be from viruses.Logical formLearned from22 sentences. A (bird flu virus strain) can be deadly.Logical formLearned from22 sentences. A code may pertain-to a virus.Logical formLearned from22 sentences. Effects may pertain-to a virus.Logical formLearned from22 sentences. A breeding ground can be for a virus.Logical formLearned from22 sentences. A virus may infect cells.Logical formLearned from22 sentences. Some viruses may be spreaded.Logical formLearned from22 sentences. A person may come_down with a virus.Logical formLearned from22 sentences. A virus can be fatal to humans.Logical formLearned from22 sentences. A boy may die of a virus.Logical formLearned from22 sentences. A (flu virus) can be virulent.Logical formLearned from22 sentences. A virus can be hidden.Logical formLearned from22 sentences. Adults may be infected with a virus.Logical formLearned from22 sentences. Proteins may pertain-to a virus.Logical formLearned from22 sentences. Antibodies may neutralize a virus.Logical formLearned from21 sentences.