A (virus infection) may pertain-to a male.Logical formLearned from19 sentences. A virus may undergo resistance.Logical formLearned from19 sentences. Scientists may study a virus.Logical formLearned from19 sentences. Virus may kill some persons.Logical formLearned from19 sentences. Strains may pertain-to a (flu virus).Logical formLearned from19 sentences. Viruses may infect humans.Logical formLearned from19 sentences. Sources may pertain-to a virus.Logical formLearned from19 sentences. Information can be about (computer viruses).Logical formLearned from19 sentences. A (virus vaccine) can be attenuated.Logical formLearned from19 sentences. A virus can be dangerous.Logical formLearned from19 sentences. A (virus protection) can be comprehensive.Logical formLearned from19 sentences. An (anemia virus) can be equine.Logical formLearned from19 sentences. Viruses can be prevalent.Logical formLearned from19 sentences. A (hepatitis c virus infection) can be chronic.Logical formLearned from19 sentences. A virus can be in a bloodstream.Logical formLearned from19 sentences.