One-third of a population may be infected.Logical formLearned from3 sentences. An elderly woman may be infected with colis.Logical formLearned from3 sentences. Children may be infected with a human (immunodeficiency virus).Logical formLearned from3 sentences. Some percent of injecting (drug users) may be infected.Logical formLearned from3 sentences. Worms may infect a population.Logical formLearned from3 sentences. Mosquitoes may be infected with yellow fever.Logical formLearned from3 sentences. Some persons may be infected by (bird flu).Logical formLearned from3 sentences. Some patients may be infected with (hepatitis c virus).Logical formLearned from3 sentences. A partner may be infected with a virus.Logical formLearned from3 sentences. Infants may be infected with organisms.Logical formLearned from3 sentences. Mammals may be infected with a virus.Logical formLearned from3 sentences. A virus may infect hosts.Logical formLearned from3 sentences. Individuals may be infected by tuberculosis.Logical formLearned from3 sentences. A virus may infect a machine.Logical formLearned from3 sentences. He/she may be infected.Logical formLearned from3 sentences.