Someone may be infected by a bird.Logical formLearned from2 sentences. Persons may be infected by birds.Logical formLearned from2 sentences. Some percent of 18-24-year-olds may be infected.Logical formLearned from2 sentences. A teen may be infected.Logical formLearned from2 sentences. An operation may infect computers with software.Logical formLearned from2 sentences. A person may be infected with a (bird flu virus).Logical formLearned from2 sentences. Soldiers may be infected with hiv/aids.Logical formLearned from2 sentences. Persons may infect pigeons.Logical formLearned from2 sentences. A (big-city epidemic) may infect white men.Logical formLearned from2 sentences. Birds may be infected with viruses.Logical formLearned from2 sentences. Some migratory birds may be infected with (bird flu).Logical formLearned from2 sentences. Some wild ducks may be infected with a subtype of (bird flu).Logical formLearned from2 sentences. Song may infect some sexual partners.Logical formLearned from2 sentences. A mammal may be infected with h5n1s.Logical formLearned from2 sentences. A strain of a virus may infect a range of mammals.Logical formLearned from2 sentences.