WHO also sought data on the clinical spectrum and patterns of the disease and how this compares with what is seen during epidemics of seasonal influenza.
世卫组织还征集了关于该病临床范围和规律以及与季节性流感流行期所见情况进行比较的数据。
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Influenza a (H1N1) has a very different clinical picture, which is so far mostly mild and self-limiting, unlike H5N1, which had a 50% to 60% mortality rate.