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                           TRIENNIAL REPORT

                                                       OF

                       VACCINATION IN BENGAL

                                           FOR, THE YEARS

             1902-1903,1903-1904, AND 1904-1905.

Officer in charge of the Depart-
ment.

This report deals with the triennial period 1902-1903 to 1904-1905. Major
H. J. Dyson, I.M.S., was in charge of the Depart-
ment from 1st April to 30th June 1902, Captain
(now Major) B. H. Deare, I.M.S., from 4th August
1902 to 10th March 1903, Major F. C. Clarkson, I.M.S., from 11th March 1903
to 15th March 1905, and Captain W. Clemesha, I.M.S., from 1st July to 3rd
August 1902 and again from 16th to 31st March 1905.

2. In the Metropolitan circle, there was no Deputy Sanitary Commis-
sioner from 1st April to 21st May 1902, from 30 th April to 8th May 1903,
from 5th August to 30th August 1903, and from 16th to 31st March 1905.
The Northern Bengal Circle was also without a Deputy Sanitary Commis-
sioner from 1st July to 3rd August 1902, and from 5th to 16th September 1903.

Strength of Staff.

3. In Calcutta the average number of Inspecting officers and operators
was 7 and 28 against 8 and 31, respectively, of
1899—1902. In Provincial rural areas and mufassal
municipalities and dispensaries, etc., the inspecting staff and operators, includ-
ing apprentices, numbered 253 and 3,460 and 10 and 207, respectively, against
247 and 3,465 and 10 and 236, respectively, of the previous triennial period.

General operations.

4. The total number of operations performed in the Province during
the past year was 2,897,907, of which 2,798,006
were primary and 99,901 revaccination against
2,748,638 with 2,634,563 primary and 114,075 revaccination of 1903-1904,
and 2,781,972 with 2,592,177 primary and 1,89,795 revaccination of 1902-
1903. The average of the triennial period under review was 2,809,506 with
2,674,916 primary and 134,590 revaccination againt 2,420,552 with 2,320,568
primary and 99,984 revaccination of 1899—1902. There was thus an average
increase of 388,954 cases, there having been an increase of 3,54,348 in primary
cases and 34,606 in revaccination. Although there was a satisfactory increase
of operations in the Province as a whole, the period under review shews an
average decrease of 4,624 cases in mufassil municipalities, dispensaries, etc.,
and 7,896 in the town of Calcutta, as compared with the previous triennial
period 1899—1902. The decrease in Calcutta is specially noticeable. It is due
to the larger number of vaccinations performed during 1900-1901 owing to a
severe outbreak of small-pox in the town.

The ratio of success under the two different heads, Primary and Revacci-
nation, excluding the cases in which the results were not known, was 98.79 and
68.73 against 98.46 and 65.36, respectively, of 1899—1902. The average work
of a vaccinator was 978 against 777 of the previous triennial period. The
average work of a licensed and paid vaccinator was 1,003 and 798 against 788
and 697, respectively, of 1899—1902.

Out of the 49 districts of Bengal, including the Tributary States of Orissa
and Chota Nagpur, there was an increase of operations in 29 and a decrease