A virus can be lethal.Logical formLearned from99 sentences. A virus can be in blood.Logical formLearned from99 sentences. A virus may be detected.Logical formLearned from97 sentences. Traces may pertain-to a virus.Logical formLearned from96 sentences. A virus may infect humans.Logical formLearned from95 sentences. A result may pertain-to a virus.Logical formLearned from95 sentences. Evidence may pertain-to a virus.Logical formLearned from95 sentences. A virus may be found.Logical formLearned from95 sentences. Infection can be by a virus.Logical formLearned from94 sentences. Some strains can be constituted-of-or-filled-with virus.Logical formLearned from94 sentences. Virus can be in blood.Logical formLearned from94 sentences. A virus may enter a body.Logical formLearned from94 sentences. A person may contract a virus.Logical formLearned from93 sentences. A virus may emerge.Logical formLearned from93 sentences. A virus may pertain-to a country.Logical formLearned from92 sentences.