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达县是流行性出血热(以下简称出血热)疫区。近几年来,我们对出血热进行了流行病学调查。现将调查结果报道如下
Daxian is epidemic hemorrhagic fever (hereinafter referred to as hemorrhagic fever) epidemic area. In recent years, we conducted an epidemiological investigation of haemorrhagic fever. Now the survey results are reported below