256 



2. Among the seventy-three who did not present any distinct attack 

 within the first twenty-five days. 



40 were subsequently attacked with simple "acclimation fever." 

 5 suffered an attack of regular albuminuric yellow fever. 

 4 had melano-albuminuric yellow fever. 

 24 have never had any fever of the yellow fever type. 



73 



Two of the melano-albuminuric, and one of the albuminuric were 

 fatal, giving a mortality of 3.87, equivalent to 3y 2 per cent. One occurred 

 in 1884, and the two others in 1893. 



Apart from these general results, the following particulars deserve to 

 be considered: The yellow fever epidemic, during the present year (1893), 

 has been unusually severe, showing not only a large number of invasions 

 and a high death-rate, but also several exceptional cases, in natives of the 

 island, in an American Negro, and in a foreign sister of charity who had 

 been residing in the civil hospital for eleven years. Special opportunities 

 have, moreover, been offered for observing the effects of the infection 

 upon a certain number of inoculated persons as compared with others 

 similarly exposed, but who had not been previously inoculated. This hap- 

 pened in consequence of a severe infection which found its way. through 

 the non-inoculated subjects, into the two establisments (religious commu- 

 nities) in which the majority of my mosquito inoculations have of late 

 years been performed. One is the residence of the Jesuit Fathers, and the 

 other the Convent of the Carmelite Friars in this city, both having been 

 under my medical charge for the last eight or nine years. Members of those 

 communities arrive almost every year, and stay, as a rule, in Havana du- 

 ring four consecutive years at the least. After deducting, as practically 

 insusceptible, all the inoculated and non-inoculated who have resided more 

 than six consecutive years in Havana, the susceptible inmates in each 

 establishment (from July to December 1893) may be thus classified. 



Jesuites — 2 non-inoculated and 17 inoculated. 



Carmelites — 2 non-inoculated and 10 inoculated. 



Of the two non-inoculated members of the Jesuits' community, one was 

 attacked with violent melano-albuminuric yellow fever on the 25th of 

 July and died on the 29th. He had resided four years in Havana (from 

 1880 to 1884), and experienced at that time an attack of yellow fever; he 

 then returned to Spain, and only came back to Havana in 1891. The 

 second non-inoculated Jesuit has now resided during five consecutive 

 years in the same establisment without having as yet experienced any 

 fever whatsoever. 



Of the three non-inoculated Carmelites, one had an "acclimation fe- 

 ver" on the 27th of June; another was attacked on the 20th of July with 



