Swans may be infected with a strain.Logical formLearned from2 sentences. A parrot may be infected with a virus.Logical formLearned from2 sentences. A disease may be infected by droplets.Logical formLearned from2 sentences. A swan may be infected with a (bird flu strain).Logical formLearned from2 sentences. Birds may be infected with a (h5n1 virus).Logical formLearned from2 sentences. A disease may infect a political-leader.Logical formLearned from2 sentences. Birds may be infected by a strain.Logical formLearned from2 sentences. Some lads may infect a number of computers with a worm.Logical formLearned from2 sentences. Farmers may be infected with avian flu.Logical formLearned from2 sentences. A (research team) may infect some hamsters with prions.Logical formLearned from2 sentences. Some (bird flu outbreak) may infect some persons.Logical formLearned from2 sentences. Viruses may infect (meat cultures).Logical formLearned from2 sentences. Dozens of toddlers may be infected by a disease.Logical formLearned from2 sentences. Some (family members) may be infected by (chicken droppings).Logical formLearned from2 sentences. A sheep may be infected with bacteria.Logical formLearned from2 sentences.