A virus may be confirmed.Logical formLearned from55 sentences. Persons may have a virus.Logical formLearned from55 sentences. A virus can be suspected.Logical formLearned from54 sentences. A virus may emerge.Logical formLearned from54 sentences. An author may pertain-to a virus.Logical formLearned from54 sentences. A virus may affect humans.Logical formLearned from54 sentences. A virus can be gastrointestinal.Logical formLearned from54 sentences. A virus may cause fever.Logical formLearned from54 sentences. A (bird flu virus) can be pathogenic.Logical formLearned from53 sentences. A virus may undergo a treatment.Logical formLearned from53 sentences. A person may do virus.Logical formLearned from53 sentences. Viruses may be discovered.Logical formLearned from53 sentences. A possibility may pertain-to a virus.Logical formLearned from53 sentences. A (deficiency virus) can be immune.Logical formLearned from53 sentences. A class can be constituted-of-or-filled-with viruses.Logical formLearned from53 sentences.