COVID-19 report calls for tighter cold chain measures
    
        
    
      
    
      
    
        
          By Wang Xiaoyu | 
          CHINA DAILY |
          Updated: 2021-07-21 09:54
          
          
          
          
        


        
      
    
      
    
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   Disease control workers collecting samples from cold packaging in Qingdao, Shandong province on Sept 26, 2020. [Photo provided to China Daily] 
 
     

     

        
    

        
        
      
    
        
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