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taminated mosquitoes: 1. The mild acclimation observed in 94 per cent, of 

 our cases, whereas the same desirable result has only occurred, coeteris 

 paribus, in 65!/ó per cent, of the noninoculated ; 2. The reduction of cases of 

 regular yellow fever to the proportion of 6 per cent, instead of 19 per 

 cent. ; and 3 . That of fatal yellow fever to less than 2 per cent, instead of 

 15Yn per cent., one single death from yellow fever having occurred among 

 the sixty-seven persons inoculated by us since 1881 imtil the present 

 date. 



3. The contaminated mosquitoes appear to lose either partially or 

 completely their contamination after they have stung healthy subjects ; 

 whereas the contamination appears to become intensified by successive 

 stings of the same insect on yellow fever patients. 



4. The inoculations performed during the colder season should not 

 be considered to afford sufficient protection, but should be repeated on 

 the approach of the hot season. 



