The head of the World Health Organization has called for further investigation into the origins of the coronavirus pandemic after the report on its mission to Wuhan left important questions unanswered.
世界卫生组织(WHO)负责人呼吁进一步调查新型冠状病毒肺炎（COVID-19，即2019冠状病毒病）疫情起源。此前，该组织赴武汉考察团得出的报告没有回答一些重要问题。
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