( 3 )
and 81.15, against 95.22 and 63.78, respectively, during 1909-10 and 98.91 and
42.05 during the year before.
Cost of, and contribution to¬
wards, vaccination.
9. The total average cost of vaccination in Bengal for the triennial period
under review was Rs. 2,03,526-15, against
Rs. 1,70,555-9-8 of 1906-08, the cost of each suc-
cessful vaccination being 1 anna 8 pies, against
1 anna 6 pies of 1906-08. A large portion of the increased cost is accounted
for by the fact that in the statement for the period under review the cost of
vaccination in the Calcutta Municipality has been shown for the entire period,
whereas in the previous triennial report the cost on account of vaccination
for this city for two years (viz., 1905-06 and 1906-07) could not be shown,
the figures not being available.
Out of the average cost of vaccination as shown above Rs. 10,560 were
contributed by District Boards, Rs. 355 by Native States, and Rs. 198
from other sources, the corresponding figures for the preceding triennial
period being Rs. 7,943, Rs. 198, and Rs. 212, respectively.
Diagram illustrating death-rates
from small-pox and degree of
protection afforded.
10. The diagram facing this page illustrates the death-rates from small-
pox in each district with side by side the pro-
portion of population protected against the disease
by vaccination during the past seven years.
Deaths from small-pox.
11. During the past year the total number of deaths from small-pox in
the Province was 6,174 only, against 25,582 of
1909-10 and 40,927 of 1908-09, the ratio of deaths
per 1,000 of the population being .11, against .50 and .80, respectively, during
the two preceding years. The past year's rate of mortality is the lowest recorded
since 1888-89. The largest number of deaths was recorded in the districts of
Purnea (735), Bankura (707), Bhagalpur (559), Patna (494), Balasore (442) and
Midnapore (372) while the mortality was lowest in the districts of Khulna (7),
Puri (8), Cuttack (16), Nadia and Hazaribagh (17) each, and Darjeeling (18).*
Out of 6,174 persons who died of small-pox, 3,133 were reported to have
been vaccinated or otherwise protected, 1,955 were unprotected, and in 1,086
cases nothing could be ascertained. As already stated in previous reports
these figures are of no value, being utterly untrustworthy.
Animal vaccination depôts.
12. The Animal Vaccination Depôt at Darjeeling was abolished with
effect from the 1st January last. Prior to its aboli-
tion the number of calves vaccinated in it was
108 and the quantity of lymph manufactured was 30,444 grains, against
223 calves and 63,210 grains of lymph during 1909-10, and 235 calves and
69,073 grains of lymph during 1908-09. The number of calves vaccinated
in the Calcutta Animal Vaccination Depôt during the past year was 2,194,
and the quantity of lymph manufactured was 608,916, against 1,879 calves
and 520,114 grains of lymph during 1909-10, and 1,610 calves and 420,943
grains of lymph during 1908-09.
Different methods of vaccination.
13. During the past year 39,076 primary operations were performed with
lymph taken direct from the calf, 1,261,364 with
lanoline lymph, and 606,325 by arm-to-arm method,
against 43,713, 932,528 and 829,737, respectively, during the preceding year
and 73,424, 996,289 and 740,500 in the year before (1908-09). The ratio
per cent. of success under each of these methods of vaccination was 98.01,
98.62 and 99.28, respectively, against 98.46, 98.35 and 99.00 during 1909-10
and 99.49, 98.31 and 99.12 during 1908-09
The number of revaccinations under each of these processes of vaccination
was 8,153, 87,856 and 4,458 with a success of 85.07, 58.81 and 60.25 per cent.,
respectively, against 11,486, 146,411 and 12,974 with a success of 66.82, 60.22
and 69.17 per cent. during 1909-10, and 8,301, 184,026 and 16,991 with a
success of 76.83, 53.57 and 79.28 during the year before.
Supply of lymph to the Nepal
Durbar.
14. During 1910-11, seven hundred and forty grains of lymph were
supplied to the Nepal Durbar from the Animal
Vaccination Depôts, and 1,590 grains to the
Sikkim State.
Inspections.
15. Captain W. C. Ross, I.M.S., Deputy Sanitary Commissioner, Bihar
and Chota Nagpur Circle, made systematic tours
every winter inspecting vaccination in outlying
* The very satisfactory result in the case of Puri and Cuttack is no doubt due to the adoption of
special measures for pushing on vaccination in Orissa as detailed in paragraph 16(g) of the last triennial
report.
*