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Covid 19 coronavirus: China clamps down in secret hunt for virus origins 31 Dec, 2020 01:08 AM 17 minutes to read Visitors explore the abandoned Wanling cave near Manhaguo village in southern China s Yunnan province on December 2. Photo / AP Visitors explore the abandoned Wanling cave near Manhaguo village in southern China s Yunnan province on December 2. Photo / AP AP By: Dake Kang, Maria Cheng and Sam McNeil Deep in the lush mountain valleys of southern China lies the entrance to a mine shaft that once harboured bats with the closest known relative of the Covid-19 virus. The area is of intense scientific interest because it may hold clues to the origins of the coronavirus that has killed more than 1.7 million people worldwide.

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