THE CONQUEST OF DISEASE 



some of their richly caparisoned brothers who 

 have no more serious occupation than drawing 

 a fluffy dame and a pug dog through Central 

 Park. 



Presently we shall forget about the scourge 

 of diphtheria, as we have that of other con- 

 quered diseases, but the mothers are still living 

 who can recall to memory the pitiful pictures 

 of their dying babes and the toll of precious 

 lives which their families paid. 



Yellow Yellow fever was one of the scourges of 



fever. the Western hemisphere. In the past one 



hundred years it has caused 100,000 deaths in 

 the United States. Forty-one thousand people 

 have died of it in New Orleans and 10,000 in 

 Philadelphia. It was endemic in Cuba until 

 animal experimentation discovered its mode of 

 transmission and prevention. The animals ex- 

 perimented with were mosquitoes and men, 

 although other animals of minor importance 

 have been used. Reed, Lazear, and Carroll, 

 three American physicians, have placed human- 

 ity under a lasting debt for their work with 

 this disease. They, with a number of volun- 

 teers from the Hospital Corps of the United 

 States Army, carried on investigations in 

 Cuba, and identified a certain variety of mos- 



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