Symptoms can be persistent.Logical formLearned from363 sentences. Symptoms may appear.Logical formLearned from361 sentences. Symptoms may disappear.Logical formLearned from358 sentences. Symptoms may pertain-to a virus.Logical formLearned from352 sentences. A person may have symptoms.Logical formLearned from338 sentences. Symptoms can be related.Logical formLearned from329 sentences. Symptoms can be constituted-of-or-filled-with stress.Logical formLearned from327 sentences. Symptoms may undergo a development.Logical formLearned from323 sentences. Symptoms may persist.Logical formLearned from320 sentences. Symptoms may pertain-to a disorder.Logical formLearned from317 sentences. Symptoms can be worse.Logical formLearned from313 sentences. Symptoms may pertain-to an illness.Logical formLearned from308 sentences. Symptoms can be painful.Logical formLearned from306 sentences. Symptoms can be debilitating.Logical formLearned from304 sentences. Symptoms can be constituted-of-or-filled-with poisoning.Logical formLearned from295 sentences.