Birds may be infected with a strain of a virus.Logical formLearned from9 sentences. A virus may infect animals.Logical formLearned from9 sentences. Some percent of pregnant women may be infected with a virus.Logical formLearned from9 sentences. A girl may be infected with (bird flu).Logical formLearned from9 sentences. An incision may be infected.Logical formLearned from9 sentences. Areas may be infected.Logical formLearned from9 sentences. A holstein may be infected with mad disease.Logical formLearned from9 sentences. Intravenous-drug users may be infected by a buying of tainted blood.Logical formLearned from9 sentences. A female may infect a son.Logical formLearned from9 sentences. A (cholera epidemic) may infect some persons.Logical formLearned from9 sentences. Persons may be infected with (dengue fever).Logical formLearned from9 sentences. Some countries may be infected.Logical formLearned from9 sentences. Meat may be infected with bovine (spongiform encephalopathy).Logical formLearned from9 sentences. Hearts may be infected with greed.Logical formLearned from9 sentences. Some crows may be infected with a virus.Logical formLearned from9 sentences.