Origin tracing shouldn't be limited to China
    
        
    
      
    
      
    
        
          
          chinadaily.com.cn |
          Updated: 2021-07-31 06:30
          
          
          
          
        


        
      
    
      
    
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    Wang Chen, academician of the Chinese Academy of Engineering, said the COVID-19 virus is extraordinarily complex. "If we want to trace its origins, we shouldn't limit our horizons and should properly expand our options," he said.
     

        
    

        
        
      
    
        
          
          
        

        
          
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