2
5. Protection afforded to infants.—During 1919-20 out of 935,708, the
estimated number of available infants for vaccination, 295,676 or 315.98 per
mille were said to have been successfully vaccinated as compared with 260.92
and 261.22 during the previous years. In four districts only the protection
afforded to infants was over 500 per mille. As reported in previous years,
the districts in the Dacca and Chittagong Divisions were the worst in
this respect. The protection afforded to infants in municipalities is shown
in Appendix VII attached to this report. It will be seen that 836.47 per
mille of the surviving infants were protected during the year against 658.95
and 582.56 during 1918-19 and 1917-18, respectively.
6. Recess work.—Altogether 556,400 vaccinations were performed'
during the recess or non-working season of 1919-20 in connection with small-
pox epidemic against 193,147 and 123,203 during the two previous years.
The average recess operation of the triennial period was 290,917 as compared
with 158,848 during the past triennium.
7. Six-puncture vaccination.—The total number of successful primary
and re-vaccination operations performed in six points during 1919-20 was
214,069 and 19,051, respectively, as compared with 153,184 and 6,404 during
1918-19 and 196,136 and 3,763 during 1917-18. The average of the triennial
period was 187,796 primary and 9,739 re-vaccination cases against 240,303
and 13,464, respectively, during the previous epoch.
8. Factory and tea garden vaccination.—Seven thousand seven
hundred and seventy-five primary and 20,264 re-vaccinations were performed
in factories and tea gardens in this Presidency during 1919-20 against 4,002
and 10,896, and 6,801, and 2,007 during the two preceding years. The average
of the triennial period was 6,193 primary and 11,056 re-vaccination cases as
compared with 5,855 and 3,704 during the previous triennium.
9. Cost of and contribution towards vaccination.—The total
average cost of vaccination during the triennial period under review was
Rs. 2,47,585-0-11 against Rs. 1,98,549-2-9 during the previous triennium, the
cost of each successful case of vaccination being two annas and two pies
against two annas and three pies. Out of the average cost as shown above,
Rs. 35,170-4 was contributed by the district boards and Rs. 115-1-4 by canton-
ments against Rs. 10,818-3-6 and Rs. 96-8-10 during the previous period.
10. Diagram illustrating death-rates from small-pox and degree of
protection afforded.—The death rates from small-pox in each district and the
proportion of population protected against the disease by vaccination during
the past seven years are shown in the diagram facing this page.
11. Deaths from small-pox.—During 1919-20 the total number of
deaths recorded from small-pox was 41,200 against 12,147 and 7,020 during
the two previous years, the ratio per mille of population being .90 against .26
and .15. The largest number of deaths were recorded in the districts of
Rangpur (6,381), Calcutta (3,935), Dacca (3,487), Bogra (2,742), Pabna (2,636),
Tippera (2,585), Mymensingh (2,360), 24-Parganas (2,021), Faridpur (1,644),
Midnapur (1,619), Nadia (1,568), Howrah (1,400), Dinajpur. (1,380), Hooghly
(1,293), Rajshahi (1,036), Malda (899), Jalpaiguri (622) and Noakhali (608).
Darjeeling, Khulna and Chittagong districts had 130, 143 and 160 deaths,
respectively.
12. Animal Vaccine Depôt.—The total number of calves vaccinated in
the Animal Vaccine Depôt, Calcutta, during 1919-20 was 2,742 against 2,452
and 2,299 during the two previous years, and the quantity of lymph manufac-
tured therefrom was 1,715,101, 1,058,273 and 858,759 grains respectively.
The average of the triennial period was 2,498 calves and 1,210,711 grains of
lymph against 2,281 calves and 773,807 grains of lymph during the previous
triennial period.
13. Different methods of vaccination.—During 1919-20 the total
number of primary operations performed with lymph direct from calves was
6,433, with lanoline paste 1,050,601 and with glycerinated lymph 589,065
against 2,532, 1,200,089 and 92.710, respectively, during 1918-19 and 1,223,
1,334,422 and 21,695, respectively, during. 1917-18. The ratio percentage of
success under each of these methods was 96.96, 97.04, and 96.89 against
94.51, 95.44 and 96.69 during 1918-19 and 97.54, 96.64 and 95.13 during
1917-18.