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A security officer wearing a mask and a cap with the Chinese national flag guards the entrance after the World Health Organization team arrive at an exhibition about the fight against the coronavirus in Wuhan in central China's Hubei province on Saturday, January 30, 2021. The World Health Organization team investigating the origins of the coronavirus pandemic visited another Wuhan hospital that had treated early COVID-19 patients on their second full day of work on Saturday. (Photo by Ng Han Guan/AP Photo)
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