Terrorists may have access to a virus.Logical formLearned from18 sentences. A link can be between a virus.Logical formLearned from18 sentences. A virus may pertain-to a disease.Logical formLearned from18 sentences. A virus may be related to smallpox.Logical formLearned from18 sentences. Viruses may undergo a propagation.Logical formLearned from18 sentences. A virus may be transmitted to humans by mosquitoes.Logical formLearned from18 sentences. Infections can be with viruses.Logical formLearned from18 sentences. A virus may cause acquired (immunodeficiency syndrome).Logical formLearned from18 sentences. A virus may undergo handling.Logical formLearned from18 sentences. A computer can be free of viruses.Logical formLearned from18 sentences. Virus may undergo an arrival.Logical formLearned from18 sentences. Viruses may undergo a population.Logical formLearned from18 sentences. Someone may have a virus.Logical formLearned from18 sentences. A virus may cause an outbreak.Logical formLearned from18 sentences. A virus can be true.Logical formLearned from18 sentences.