3
per mille were successfully vaccinated in the rural areas against 290.4 during
the preceding year. Only in five districts the protection was over 500 per
mille. The protection afforded to infants in municipalities is shown in
Appendix VII from which it will appear that 627.5 per mille of the surviving
infant population was protected during the year against 588.62 during
1920-21.
6. Recess vaccination.—The total number of successful primary and
re-vaccinations performed during the recess or non-working season of 1921-22
in connection with the suppression of outbreaks of small-pox amounted to
215,863 against 618,351 during the previous year.
7. Six-puncture vaccination.—The total number of successful primary
and re-vaccinations performed in six points during the year amounted to
168,976 and 7,729, respectively, against 205,082 and 45,876 during 1920-21.
8. Factory and tea garden vaccination.—Four thousand, three hundred
and thirty-three primary and 6,448 re-vaccinations were performed in fac-
tories and tea gardens in this Presidency during the year against 6,485 and
4,976, respectively, during the preceding year.
9. Cost of and contribution towards vaccination.—The total cost
of vaccination during 1921-22 amounted to Rs. 3,58,197-3-6 against
Rs. 3,13,253-8-3 during the previous year, the average cost of each success-
ful case of vaccination being three annas and nine pies against two annas and
six pies during 1920-21. The District Boards and Cantonments contributed
Rs. 1,02,560-3-11 and Rs. 250 as compared with Rs. 72,290-13-0 and
Rs. 199-7-9, respectively, during the previous year.
10. Diagram illustrating death-rates from small-pox and the degree
of protection afforded during ten years from 1912-13 to 1921-22.—The dia-
gram facing this page illustrates the average death-rates from small-pox in
each district and the proportion of population reported to have been protected
against the disease by vaccination during the past ten years being shown side
by side.
11. Deaths from small-pox.—The total number of deaths from small-pox
recorded in the Presidency during 1921-22 amounted to 6,380 as compared
with 21,950 during the preceding year, the rates per mille of population
being .14 against .48. The largest number of deaths were recorded in the
districts of Mymensingh (1,147), Dacca (766), Midnapur (569), Murshi¬
dabad (515), Dinajpur (476), Chittagong (444), Jalpaiguri (409), Calcutta
(309), Howrah (295), Tippera (214), 24-Parganas (209), Jessore (169),
Faridpur (134), Malda (121), Burdwan (115), Hooghly (80), Rangpur (78),
Nadia (61), Rajshahi (59) and Bogra (55), while the districts of Birbhum,
Bakarganj, Noakhali, Pabna, Bankura and Khulna had 42, 35, 27, 23, 15
and 13 deaths, respectively. There was no death from this disease in the
Darjeeling district.
12. Bengal Vaccine Depôt.—The total number of calves vaccinated
during the year was 2,456 against 2,278 during 1920-21 and the quantity
of lymph manufactured was 149,022 grains against 1,506,164 grains during
the preceding year.
13. Different methods of vaccination.—During 1921-22 no vaccination
was performed with lymph direct from calf. Only lanolinated paste and
glycerinated lymph were used. The total number of primary vaccinations
performed with lanoline lymph was 256,351 and with glycerinated lymph
1,010,200 against 535,354 and 882,573, respectively, during the previous
year. The percentage of success under each of these methods was 96.7 and
96.4 againts 97.7 and 95.8. The number of re-vaccinations performed
under each of these methods was 98,403 and 396,672 with a success of 63.6
and 58.4, respectively, against 370,095 and 534,254 with a success of 71.05 and
69.6 per cent. during 1920-21.
14. Inspections.—The small number of vaccination cases inspected
by the Assistant Directors of Public Health is detailed in Appendix V.
The District Health Officers and Civil Surgeons saw 53,529 vaccinations
or 3.04 per cent. of the total persons vaccinated in the Presidency. The