236 



BIOLOGY OF DEATH 



from these two causes declined, during the period cov- 

 ered, in both the A and the B groups of countries and 

 at not far from the same rate. There is no such large 

 difference as would be expected if organized human inter- 

 ference with the natural history of disease always played 



aas 99 1300 01 



Oe 03 04 05 06 

 YEAR 



Fra. 55. — Course of the weighted average death rate, for the countries in the A (solid Une) 

 and B (broken line) groups, from typhoid fever. 



the role of immediate and large importance which the 

 propagandist asserts that it does. 



To guard against the possibility of any misunder- 

 standing, let me say quite specifically and categorically, 

 that the above is not intended in any way to convey the 

 idea that public health work is not desirable, or that a 



