Persons may be infected throughout a continent.Logical formLearned from2 sentences. A poultry may be infected with a virus.Logical formLearned from2 sentences. A geese may be infected with a virus.Logical formLearned from2 sentences. Swans may be infected by a strain of virus.Logical formLearned from2 sentences. Migratory birds may be infected with an avian-flu virus.Logical formLearned from2 sentences. Swans may be infected by (bird flu).Logical formLearned from2 sentences. Swans may be infected by a (bird flu virus).Logical formLearned from2 sentences. An (influenza strain h7n3 epidemic) may infect some fowl.Logical formLearned from2 sentences. Domestic chickens may be infected.Logical formLearned from2 sentences. A (bird flu virus) may infect fowl.Logical formLearned from2 sentences. A man may be infected by a virus.Logical formLearned from2 sentences. Migratory birds may be infected with a (bird flu virus).Logical formLearned from2 sentences. Humans may be infected with flu.Logical formLearned from2 sentences. A (h5ni strain) may infect some persons.Logical formLearned from2 sentences. An ailment may infect some residents.Logical formLearned from2 sentences.