4. Detention camp. 



In most epidemics it is necessary to provide means to permit per- 

 sons to leave the infected district without danger of carrying the 

 disease elsewhere. This may be accomplished by a so-called "de- 

 tention camp," where those wishing to leave the infected locality may 

 do so after being detained under observation for the time requisite to 

 assure their freedom from infection. 



With our present knowledge of the transmission of yellow fever 

 it is unnecessary to establish these " camps," as heretofore, in out- 

 of-the-way or inconvenient places. On the contrary, they may be 

 located with perfect safety within the infected district so long as the 

 detained persons are kept in mosquito-proof quarters and, when their 

 period of observation has terminated, are taken to their destination 

 in mosquito-proof conveyances while within the infected area. 



It is plain, however, that in a properly educated community where 

 the measures above advocated can be put in practice, there will 

 scarcely be any necessity for a detention camp. 



In the foregoing pages the writer has endeavored to outline a 

 scheme or plan of prophylaxis which he feels quite sure will do the 

 work expected of it. The machinery is there, but where is the power 

 to set it in motion? To start it successfully, smoothly, and without 

 friction, some central authority with the necessary means and power, 

 acting surely and swiftly, must be provided. This should be the 

 function of the Government. 



PEOPHYLAOTIO MEASURES SUGGESTED BY THE FRENCH COMMISSION 

 OF THE PASTEUE INSTITUTE. 



Much interest is attached to the means of prophylaxis suggested 

 by the results obtained by the French commission of the Pasteur 

 Institute in their report on the investigation of yellow fever, pub- 

 lished in the Annals of the Institute in November, 1903, to wit : 



1. An injection of virulent blood serum which has been heated for 

 five minutes at a temperature of 55°C. confers a relative immunity, 

 which may become complete if followed by the injection of a very 

 small quantity of virulent serum. 



2. The injection of defibrinated blood which has been kept under 

 liquid vaseline for eight days confers a relative immunity. 



3. The serum of a convalescent is endowed with preventive proper- 

 ties. 



i. The immunity conferred by the serum of the convalescent is 

 still in evidence at the end of twenty-six days." 



"Abstract of Report, French Yellow Fever Commission; Annual Report, 

 TJ. S. Public Health and Marine-Hospital Service, 1904. 



