Proteins may pertain-to a virus.Logical formLearned from20 sentences. A virus may appear in a country.Logical formLearned from20 sentences. (Virus definitions) may be updated.Logical formLearned from20 sentences. Samples can be constituted-of-or-filled-with viruses.Logical formLearned from20 sentences. Threats can be from viruses.Logical formLearned from20 sentences. A virus may be used in a vaccine.Logical formLearned from20 sentences. A virus may pertain-to year.Logical formLearned from20 sentences. A virus may kill some children.Logical formLearned from20 sentences. A virus may be contracted through contact.Logical formLearned from20 sentences. A virus may undergo a surveillance.Logical formLearned from20 sentences. Pigs may have a virus.Logical formLearned from20 sentences. A virus may pose a threat.Logical formLearned from20 sentences. Strain may pertain-to a virus.Logical formLearned from20 sentences. A re-emergence may pertain-to a virus.Logical formLearned from20 sentences. Pieces may pertain-to a virus.Logical formLearned from20 sentences.