VACCINE, cilt.25, sa.21, ss.4261-4265, 2007 (SCI-Expanded)
                        
                            
                        
                        
                            
                        
                        
                            
                        
                        
                            
                        
                        
            
Aims: This study deals with the history of variolation as the oldest immunization method to be transferred from East to West, with emphasis on Turkey's role in this transmission.