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１９９９年２～３月，我区商水县突然发生病因不明的突发疾病，造成了严重的损失和社会影响。为了查明病因，有效地预防疾病发生。省、地、县卫生防疫部门进行了深入细致的调查研究，发病原因已被查明。１－发病概况：１９９９年２月２４日至３月２３日，商水县张庄乡唐庄村相?
From February to March 1999, a sudden disease with unknown etiology occurred in Shangshui County, and caused serious losses and social impacts. In order to identify the cause, effectively prevent the disease. Provincial, prefectural and county health and epidemic prevention departments conducted a thorough and detailed investigation and study, the etiology has been identified. 1- Overview of onset: February 24, 1999 to March 23, Zhangzhuang Township, Shangshui County Tangzhuang phase?