A virus may circulate in a country.Logical formLearned from31 sentences. Machines may be infected with viruses.Logical formLearned from31 sentences. A virus can be aggressive.Logical formLearned from31 sentences. Some medics may be convicted of infecting children.Logical formLearned from31 sentences. A virus may be eradicated.Logical formLearned from31 sentences. A disease may be caused by a virus.Logical formLearned from31 sentences. A virus can be in birds.Logical formLearned from30 sentences. A virus can be vicious.Logical formLearned from30 sentences. A virus may cause smallpox.Logical formLearned from30 sentences. A virus may undergo a sequencing.Logical formLearned from30 sentences. Viruses can be in a family.Logical formLearned from30 sentences. Viruses may be found.Logical formLearned from30 sentences. A virus may undergo survival.Logical formLearned from30 sentences. Cases can be constituted-of-or-filled-with virus.Logical formLearned from30 sentences. A disease may be caused by a virus.Logical formLearned from30 sentences.