38 [CHAP. i., ?T. IV.
3rd Period, 22nd to 31st May.
Operators.
INOCULATED.
NOT INOCULATED.
Numbers.
Cases.
Deaths.
Percentage
of Mortality.
Numbers.
Deaths.
Percentage
of Mortality.
Dr. Kalapesi ..
1,906
1
1
0.05
Dr. Poiares
258
3
2
0.8
Total ...
2,164
4
3
0.14
4,643
93
2.0
If the inoculated had suffered in the same proportion as the uninoculated, they should have
had 43 deaths, instead of 3-a difference of 93 per cent.
Taking the period as a whole, the following is the result obtained :-
2,197 inoculated had 36 deaths, or 1.6 % of mortality.
6,033 not inoculated had 1,482 deaths, or 24.6 % of mortality.
As a large number of families in Damaun were entirely inoculated, and so had no
uninoculated individuals living with them for comparison, it was found necessary to compare
the whole inoculated population with all those not inoculated remaining in the town. But if
those houses be singled out in which only a portion of the inhabitants had been inoculated,
the following result is obtained. In 62 houses there were living 250 inoculated, and also 124
not inoculated :-
Numbers.
Cases.
Deaths.
Percentage of Mortality.
Inoculated
250
50
20
8.0
Not Inoculated
124
54
37
29.8
If the 250 inoculated had suffered to the same extent as the 124 uninoculated, they
should have had 75 deaths, instead of 20-a difference of 73.3 per cent.
From the above it would appear that uninoculated individuals living in the same houses
as those inoculated are a source of danger to them, and therefore inoculated people are advised
to see that those in immediate contact with them (i. e., family and servants) are likewise
operated on. It is just as much a duty to the public to be inoculated during plague-
prevalence as to be vaccinated when small-pox appears in the neighbourhood.
A striking illustration of the effect produced by the inoculation of an entire community is
afforded by the history of this epidemic among the Parsi inhabitants of Damaun. The Parsi
community of Lower Damaun numbered 306. Of these, 277 were inoculated and 29 were
not. The following shows the attacks and deaths in the two groups. No death from any
other cause than plague occurred in this community during the epidemic :-

Numbers.
Cases.
Deaths.
Percentage of Mortality.
Inoculated
277
8
1
0.36
Not Inoculated
29
4
4
13.8
If the inoculated, who were living in precisely the same social conditions as the uninoculated,
had been affected in the same proportion, they should have had 38 deaths instead of only one.