HEALTH AND WELL-BEING 



37 



of serums and antitoxins, and an explanation of the immunity 

 from small pox by vaccination advocated by Dr. Edward 

 Jenner (1749-1823) and practised more or less since 1796. 



FIG. 14. Louis Pasteur. (From Tower, Smith & Turlon.) 



Notable progress has been made in the prevention of 

 typhoid by vaccination. It already seems probable that 

 like small pox it is one of the dread diseases that will always 

 be under control, and in time largely disappear. The 

 vaccine material used contains dead typhoid germs that 

 have been grown outside the body and then killed. Usually 



