Mutations may cause syndrome.Logical formLearned from50 sentences. Mutations can be pathogenic.Logical formLearned from49 sentences. Variety can be constituted-of-or-filled-with mutations.Logical formLearned from49 sentences. A mutation can be deleterious.Logical formLearned from49 sentences. Mutations can be in a virus.Logical formLearned from49 sentences. A result can be constituted-of-or-filled-with mutations.Logical formLearned from48 sentences. A nature may pertain-to a mutation.Logical formLearned from48 sentences. Presence may pertain-to a mutation.Logical formLearned from48 sentences. A (bird flu virus) may undergo a mutation.Logical formLearned from48 sentences. Mutations can be common.Logical formLearned from47 sentences. Mutations may cause defects.Logical formLearned from47 sentences. Some mutations may be identified.Logical formLearned from46 sentences. A mutation may be found.Logical formLearned from46 sentences. An effect may pertain-to a mutation.Logical formLearned from45 sentences. A virus may undergo mutations.Logical formLearned from45 sentences.