韩卓生说，延误是由于难以诊断死亡的原因所造成，因为患者没有显示出正常的症状。

Troedsson said the delay was due to difficulties diagnosing the causes of the deaths, as they did not show the normal symptoms.

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“我们迄今所看到的情况是在这些不同的爆发之间或者之中没有什么关联，”韩卓生说。

"What we have seen so far is no connection between or among these different outbreaks," Troedsson said.

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