CHAPTER VI. 



IMMUNITY PROTECTIVE INOCULATION- 

 CURATIVE INOCULATION. 



IN the preceding chapter I have shown how 

 it is possible to prevent disease or even to cure 

 disease when already in progress by availing 

 ourselves of the same simple hygienic factors 

 which nature herself employs to convert a pre- 

 disposition to disease into immunity. 



Nature uses one remarkable method of trans- 

 forming a predisposition to disease into im- 

 munity, and this method requires special con- 

 sideration, since for some time it has been 

 utilized also as a means of curing disease. 

 The patient who has successfully passed 

 through certain " specific" infectious diseases 

 has derived some positive gain, inasmuch as he 

 appears protected or immunized against a second 

 attack ; therapeutical and medical interference 

 with disease, on the other hand, recognizes as its 

 highest aim the prevention of harm to the pa- 

 tient, the majority of cures being accompanied 

 with injury. The individual who has " had " 



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