MODERN BIOLOGIC 

 THERAPEUSIS 



Parti 



HISTORIC DEVELOPMENT OF 

 IMMUNOLOGY 



Chapter I 



HISTORY OF MEDICINE 



PRIMITIVE MEDICINE 



The common point of convergence of all med- 

 ical folklore is the notion that spirits are the 

 cause of disease. Primitive medicine is insep- 

 arable from primitive modes of religious beliefs. 

 Disease at first was regarded by savage man as 

 an evil spirit to be cajoled by burnt offerings 

 and sacrifice. A further association of ideas led 

 him to regard disease as something produced 

 by a human enemy possessing supernatural 

 powers. Again, what he saw in dreams sug- 

 gested the existence of a spirit world apart from 

 his daily life, and in this way he came to look 



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