A population may be decimated by epidemics.Logical formLearned from4 sentences. An epidemic can be constituted-of-or-filled-with phylloxera.Logical formLearned from4 sentences. Descriptions can be constituted-of-or-filled-with epidemics.Logical formLearned from4 sentences. (Polio epidemics) can be unknown.Logical formLearned from4 sentences. Epidemics can be constituted-of-or-filled-with virulence.Logical formLearned from4 sentences. A (plague epidemic) may pertain-to a world-city.Logical formLearned from4 sentences. Lessons may be learnt from an epidemic.Logical formLearned from4 sentences. An epidemic may pertain-to a fever.Logical formLearned from4 sentences. An epidemic may undergo an extinction.Logical formLearned from4 sentences. Some epidemics can be in a US-city.Logical formLearned from4 sentences. Knowledge can be about an epidemic.Logical formLearned from4 sentences. Deficiency can be an epidemic.Logical formLearned from4 sentences. A point can be in an epidemic.Logical formLearned from4 sentences. Problems may reach (epidemic proportions).Logical formLearned from4 sentences. An epidemic can be on an island.Logical formLearned from4 sentences.