immunoadjuvant
noun
                                                                                                                            
                                                            im·mu·no·ad·ju·vant
                    
                                                                                                              
                                                                                                                                  -ˈaj-ə-vənt  
                                                      
                                                          
            
                                
              
          
                                                      : a nonspecific substance acting to enhance the immune response to an antigen with which it is administered                                      
                
                    
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  Merriam-Webster unabridged




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