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mild or abortive attack less dangerous than the 

 average attack among the non-acclimatised, was 

 known to Finlay, and was confirmed in 1899 by 

 the Army Commission of the United States. 

 Except five inoculations, where evidence that the 

 persons understood the risk incurred is unhappily 

 wanting, it appears that no inoculation has been 

 made save with the consent of the person inocu- 

 lated. Further justification is to be found, if it is 

 wanted, in the fact that they who made these 

 experiments also submitted themselves to them ; 

 in the steady saving of lives that has already been 

 begun, by methods for keeping down the mosquito 

 that carries the disease ; and in the terrible death- 

 rate of the disease in its ordinary course : — 



" It is better for women and children than for 

 men ; better for old residents than for newcomers ; 

 worst of all for the intemperate. According to a 

 table of 293 carefully observed cases given by 

 Sternberg, the mean mortality in the whole 293 

 cases was 27.7 per cent. This may be taken as 

 a fairly representative mortality in yellow fever 

 among the unacclimatised, something between 25 

 and 30 per cent, although in some epidemics it has 

 risen as high as 50 or even 80 per cent, of those 

 attacked. . . . Some of these epidemic visitations 

 bring a heavy death-bill ; thus, in New Orleans in 

 l8 53> 797° people died of yellow fever; in 1867, 

 3093 ; in Rio, in 1850, it claimed 4160 victims ; in 

 1852, 1943; an d in 1886, 1397. In Havana, the 

 annual mortality from this cause ranges from 500 

 to 1600 or over." (Manson, Tropical Diseases, 

 1900.) 



