viii CONTENTS 



CHAPTER XI PAGE 



NATURAL IMMUNITY 63 



CHAPTER XII 



ACQUIRED IMMUNITY 73 



CHAPTER XIII 



ANTITOXINS 82 



PART SECOND 

 CHAPTER I 



BUBONIC PLAGUE 89 



CHAPTER II 



ASIATIC CHOLERA no 



CHAPTER III 

 TYPHOID FEVER 126 



CHAPTER IV 

 DYSENTERY, CHOLERA INFANTUM, ETC 140 



CHAPTER V 



RELAPSING FEVER 145 



CHAPTER VI 

 TYPHUS FEVER 154 



CHAPTER VII 



TUBERCULOSIS 159 



CHAPTER VIII 

 LEPROSY .181 



CHAPTER IX 



DIPHTHERIA 191 



CHAPTER X 



INFLUENZA 199 



