Persons may get a virus.Logical formLearned from23 sentences. A virus can be online.Logical formLearned from23 sentences. Cells may be infected with viruses.Logical formLearned from23 sentences. Viruses can be persistent.Logical formLearned from23 sentences. A file may contain a virus.Logical formLearned from23 sentences. A virus may have an effect.Logical formLearned from23 sentences. (Papilloma viruses) may cause cervical cancer.Logical formLearned from23 sentences. A virus may cause (hemorrhagic fever).Logical formLearned from23 sentences. An impact may pertain-to a virus.Logical formLearned from23 sentences. Blood may be tainted with a virus.Logical formLearned from23 sentences. A virus may be uncovered.Logical formLearned from23 sentences. A virus may have potential.Logical formLearned from23 sentences. A virus can be deadly to humans.Logical formLearned from23 sentences. A virus may become a pandemic.Logical formLearned from23 sentences. An (avian influenza virus) can be deadly.Logical formLearned from23 sentences.