Protocol to request
            
                Neutralization assay using an authentic virus strain
                
                
            
        
        
            
                Research Article
            
            
                Comprehensive analysis of nasal IgA antibodies induced by intranasal administration of the SARS-CoV-2 spike protein
                
            
            
            
                Kentarou Waki et al.
            
            
                DOI: 10.7554/eLife.88387