sporadic disease
偶发性精神病 accidental psychosis
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第二，一些偶发病例地区开始集中爆发流感，特别是缺少医疗设施对抗这种疾病的偏远地区。
Second, while there were sporadic cases in the past, the virus has now centralized in some areas, especially in remote places which lack facilities to deal with the disease.
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