PROTECTIVE INOCULATIONS. 307 
‘‘Many of the prisoners on being told about preventive inoculation wished 
to be inoculated, and M. Haffkine, who had previously been communicated 
with, and whose zeal and enthusiasm in the cause that he so well advocates 
are beyond praise, arrived here on the 18th July, and in the presence of Sur- 
geon-Colonel Harvey, who kindly assisted, and myself, inoculated 147 
prisoners, and on the 19th 68, making a total of 215 out of 433 present in the 
jail on that date. 
‘‘Being purely voluntary, no selection of prisoners was possible ; but all 
classes in the jail were represented, male and female, old and young, habit- 
uals and less frequent offenders, strong and weakly, convalescent and even 
hospital patients sent their representatives. No difference of any kind was 
made between inoculated and non-inoculated prisoners; they were under 
absolutely identical conditions as regards food, water, accommodation, etc., 
in short, in every possible respect. 
‘As, owing to the progress of the epidemic, a large number of prisoners 
were removed from the jail into camp, it will be found convenient to con- 
sider the effect produced by the anticholera inoculation under three head- 
ings: : 
‘*(a) The first will include the period from the 18th July, the date of first 
inoculations, to the 24th July, the date on which final reinoculations were 
made, and refers to all the prisoners. ; 
‘*(b) The second concerns the prisoners who remained in jail after the 
majority were removed into camp, and comprises the period from 25th July 
to 2d August, on which date the final case occurred among this body of 
prisoners. 
‘‘(ce) The third refers to the body of prisoners who were moved into camp 
on 25th July, and includes the period between that date and ist August, 
when the final case occurred among this body. ‘ 
Percentage Percentage Percentage 
A Chol- eee 
Plena | Sea an | eee eee | Pade te 
* No. 1 
Tnoculated............. 211.2 5 2.37 4 1.89 80.0 
Not inoculated......... 209.0 7 en 5 2.39 71.42 
No. 
{noculated............. 32.5 a “3.07 vil, Nil. Nil. 
Not inoculated......... 48.55 7 1if42 / 3 6,18 42.86 
‘s No. Ill 
Inoculated............. 171.42 2 _ 116 1 0.58 50.0 
Not inoculated......... 146.5 6 4.09 2 1.36 33.33 
‘*The conclusions to be drawn from the results above recorded appear to 
me to be that for the first few days the inoculations have scarcely any protec- 
tive influence ; then their effect seems to gradually increase. M. Haffkine in 
his publications has laid stress on the fact that he anticipates a period of ten 
days would elapse from date of first inoculations before the full effect would 
be obtained. 
DURING THE FIRST FIVE || Frrsv THREE DAYS AFTER : 
DAYS AFTER FIRST INOC- SECOND INOCULATION, LAST SIX DAYS. 
ULATION. ; 
Cases. Deaths. Cases. | Deaths. Cases. | Deaths. 
Inoculated...... 5 4 3 1 Nil. Nil. 
Not inoculated... 7 5 5 3 8 2 
