I9I3-] TYPHOID FEVER BY VACCINATION. 233 



In conclusion, I think we are justified in saying that in anti- 

 typhoid vaccination we have an efficient method for the control of 

 the disease under many and varying circumstances. It can never, 

 however, take the place of sanitation, the proper disposal of sewage, 

 and provision of safe water supplies. 



Wisconsin State Laboratory of Hygiene, 

 Madison, Wis., April, 1913. 



