A virus can be established.Logical formLearned from11 sentences. A virus may enter a central nervous system.Logical formLearned from11 sentences. A virus may cause problems.Logical formLearned from11 sentences. A virus may be cleaned.Logical formLearned from11 sentences. Virus may cause disease.Logical formLearned from11 sentences. Testing can be for viruses.Logical formLearned from11 sentences. Viruses may undergo survival.Logical formLearned from11 sentences. Virus may undergo a surveillance.Logical formLearned from11 sentences. A person may find a virus.Logical formLearned from11 sentences. A disease may be caused by virus.Logical formLearned from11 sentences. A virus may undergo an adaptation.Logical formLearned from11 sentences. Human (immunodeficiency virus) can be in patients.Logical formLearned from11 sentences. A capacity may pertain-to a virus.Logical formLearned from11 sentences. A virus may sweep the world.Logical formLearned from11 sentences. Viruses may undergo a monitoring.Logical formLearned from11 sentences.