Some studies indicate the novel coronavirus may have been circulating outside China before the country reported its first case of COVID-19 in late December 2019.
Tracing the origin of the virus should be done scientifically, which is vital to enhance global cooperation based on openness, trust and collaboration.
In this video, let's take a look at the timeline so far.
Script: Wang Shuqing
Voiceover: Jocelyn Eikenburg
Video editor: Wang Junwei
Supervisors: Zhang Chunyan and Dai Yan
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