Birds may be infected with a strain of (bird flu).Logical formLearned from8 sentences. Persons may be infected with strains.Logical formLearned from8 sentences. A virus may infect a liver.Logical formLearned from8 sentences. Persons may be infected with (chemical weapons).Logical formLearned from8 sentences. Areas may be infected with (bird flu).Logical formLearned from8 sentences. A mother may be infected.Logical formLearned from8 sentences. Persons may be infected with a (bird flu).Logical formLearned from8 sentences. Human beings may be infected.Logical formLearned from8 sentences. Some percent of some animals may be infected with (mouth disease).Logical formLearned from8 sentences. Persons may infect others.Logical formLearned from8 sentences. Scientists may infect monkeys with a coronavirus.Logical formLearned from8 sentences. Some students may be infected.Logical formLearned from8 sentences. Some birds may be infected with avian flu.Logical formLearned from8 sentences. A worm may infect a computer.Logical formLearned from8 sentences. An industry may be blamed for infecting thousands of villagers.Logical formLearned from8 sentences.