14 



Further study on this line may give us an immunitive serum which 

 will be of great value in controlling yellow fever. 



However, even though we attain this and, furthermore, discover 

 the etiological factor in yellow fever we will still, in a great measure, 

 have to depend on the hieans of prophylaxis herein outlined, and I 

 desire, therefore, to impress upon the reader the importance of edu- 

 cation as a prophylactic factor and the necessity of clothing the 

 sanitary officer with the requisite power and authority to enforce 

 the measures that we now have at our command, which are simple 

 and efficient. 



O 



