CHAPTER XII 



DISCOVERY OF THE MODE OF TKAXSINIISSIOX OF YELLOW 

 FEVER AND PLAN OF CAMPAIGN AGAINST THE MOSQUITO 



YELLOW FEVER 



Scientific Facts recorded in connection with Yellow Fever 



Yellow fever is an exceedingly good example of a 

 disease in which, although up to date the actual 

 parasite or agent which produces the disease has not 

 been conclusively demonstrated as in the case of 

 malaria, sleeping sickness, INIalta fever, tuberculosis, 

 and numerous other infectious diseases, nevertheless 

 certain other facts in connection with the disease 

 have been so convincingly proved that from the 

 administrative side, that is from the prophylaxis 

 point of view, there is not the trace of a doubt as to 

 how the disease can be prevented or what are tlie 

 conditions which make it quite impossible for it to 

 spread. 



The prevention of yellow fever is one of the most 

 brilhant triumphs of modern prophylaxis. The founda- 

 tion of exact yellow fever prophylaxis was laid in 



June 1900 by Army Surgeons Reed, Carroll, Agra- 



129 9 



