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    Seed of hope: COVID-19 vaccine trials begin
    

    
Source: China.org.cn|
Published: 2020-04-02

    

      
    
             
    
        
    
        
    
          
        
    
      
    
      
    
      

      
    
      
    
                        
    Seed of hope: COVID-19 vaccine trials begin.
    
 
            
      
    

    

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