Infections can be with a virus.Logical formLearned from29 sentences. Symptoms can be constituted-of-or-filled-with virus.Logical formLearned from29 sentences. A virus can be causative.Logical formLearned from29 sentences. A (virus program) may pertain-to a person.Logical formLearned from29 sentences. A (mosaic virus) can be yellow.Logical formLearned from29 sentences. A (vaccinia virus) can be recombinant.Logical formLearned from29 sentences. A virus may cause (chicken pox).Logical formLearned from29 sentences. A defense can be against viruses.Logical formLearned from29 sentences. A pandemic may pertain-to a virus.Logical formLearned from29 sentences. Surveillance can be for a virus.Logical formLearned from29 sentences. A virus may play a role.Logical formLearned from29 sentences. A male may have a (stomach virus).Logical formLearned from29 sentences. Persons may be infected with a virus.Logical formLearned from29 sentences. A path may pertain-to a (livestock virus).Logical formLearned from29 sentences. A human (papilloma virus) can be transmitted.Logical formLearned from29 sentences.