Persons may be infected in a region.Logical formLearned from5 sentences. Some students may be infected with a virus.Logical formLearned from5 sentences. A person may be infected with flu.Logical formLearned from5 sentences. Some soldiers may be infected with flu.Logical formLearned from5 sentences. Some bride may be infected with a virus.Logical formLearned from5 sentences. A friend may be infected.Logical formLearned from5 sentences. A worldwide may be infected with a virus.Logical formLearned from5 sentences. A boy may be infected with ev-71.Logical formLearned from5 sentences. A fruit may be infected in a country.Logical formLearned from5 sentences. A strain may be infected.Logical formLearned from5 sentences. A strain may be infected.Logical formLearned from5 sentences. Persons may be infected with a (bird flu strain).Logical formLearned from5 sentences. Residents may be infected.Logical formLearned from5 sentences. A worm may infect a computer.Logical formLearned from5 sentences. Humans may be infected by a virus.Logical formLearned from5 sentences.