Protocol to request
            
                Detecting the antigen-specific IL-4 and IFN-γ cytokine production by ELISA
                
                
            
        
        
            
                Research article
            
            
                A recombinant protein containing influenza viral conserved epitopes and superantigen induces broad-spectrum protection
                
            
            
            
                Yansheng Li et al.
            
            
                DOI: 10.7554/eLife.71725