VACCINES IN PROPHYLAXIS OF DISEASE 209 



travel or for life in the country. It is especial- 

 ly recommended that children going away on 

 vacations or to schools and colleges be vacci- 

 nated. Railroads and other industrial concerns 

 that employ armies of labor, as well as indi- 

 viduals on farms and all persons who are com- 

 pelled to live under unsupervised sanitary con- 

 ditions, find in typhoid vaccination a great 

 boon. 



. Tuberculosis A fear has been expressed 

 that typhoid vaccination may light up a latent 

 tuberculosis. On this subject, Major Bussel of 

 the United States Army says : ' * Our statistics 

 show that not only has the steady decrease in 

 the number of cases of tuberculosis in the army 

 been maintained, but that the decrease in the 

 number of cases has been more rapid since the 

 introduction of compulsory vaccination. This 

 was, no doubt, due to the improved sanitary 

 conditions and the greater care exercised in ex- 

 amining the recruits. In the annals of medicine 

 there is only one campaign that can be com- 

 pared to this one, and that is the practical ex- 

 termination of smallpox by vaccination." 



PARATYPHOID FEVER 



The bacilli now recognized as paratyphosus 



