A virus may carry a gene.Logical formLearned from13 sentences. Prevalence may pertain-to a virus.Logical formLearned from13 sentences. Virus can be an infection.Logical formLearned from13 sentences. A vaccine can be for a virus.Logical formLearned from13 sentences. A (virus wall) may pertain-to a lab.Logical formLearned from13 sentences. Viruses may be concerned.Logical formLearned from13 sentences. Virus may be carried in air.Logical formLearned from13 sentences. Activity can be against virus.Logical formLearned from13 sentences. A virus may show an ability.Logical formLearned from13 sentences. An immune response can be to viruses.Logical formLearned from13 sentences. Viruses can be other.Logical formLearned from13 sentences. Viruses can be a concern.Logical formLearned from13 sentences. A reemergence may pertain-to a virus.Logical formLearned from13 sentences. An outside may pertain-to a virus.Logical formLearned from13 sentences. A person can be with a virus.Logical formLearned from13 sentences.