A virus can be in a hospital.Logical formLearned from16 sentences. A virus may replicate itself.Logical formLearned from16 sentences. A person may co-discover a virus.Logical formLearned from16 sentences. Patients may be infected with a human (immunodeficiency virus).Logical formLearned from16 sentences. A virus can be undetectable.Logical formLearned from16 sentences. Viruses may pertain-to a family.Logical formLearned from16 sentences. A virus may enter a cell.Logical formLearned from16 sentences. A combination can be constituted-of-or-filled-with viruses.Logical formLearned from16 sentences. A (virus database) may be updated.Logical formLearned from16 sentences. Attacks can be constituted-of-or-filled-with viruses.Logical formLearned from16 sentences. A message may contain a virus.Logical formLearned from16 sentences. A virus may be transmitted by mosquitoes.Logical formLearned from16 sentences. An illness may be caused by a virus.Logical formLearned from16 sentences. Some percent can be constituted-of-or-filled-with some viruses.Logical formLearned from16 sentences. A vaccine can be a virus.Logical formLearned from16 sentences.