A (blood protein) may be infected with a virus.Logical formLearned from5 sentences. Horses may be infected with a virus.Logical formLearned from5 sentences. Patients may be infected with viruses.Logical formLearned from5 sentences. Other persons may be infected.Logical formLearned from5 sentences. A colon may be infected.Logical formLearned from5 sentences. A patient may be infected by a strain of a virus.Logical formLearned from5 sentences. Thousands of persons may be infected with a virus.Logical formLearned from5 sentences. Some persons may be infected in some countries.Logical formLearned from5 sentences. Flu may infect some persons.Logical formLearned from5 sentences. A group of primary-school students may be infected in a village.Logical formLearned from5 sentences. Hundreds may be infected at a school.Logical formLearned from5 sentences. Patients may be infected with flu.Logical formLearned from5 sentences. Some persons may be infected around a globe.Logical formLearned from5 sentences. Young persons may be infected.Logical formLearned from5 sentences. A disease may infect some pigs.Logical formLearned from5 sentences.