3
various kinds of lymph, their suitability for use in the mufassal, both during
the hot and the cold seasons and the protective power of vaccination with
the different kinds of lymph during the incubation period of small-pox. It has
been ascertained that glycerine lymph deteriorates very rapidly in hot
weather, whereas lanoline paste can with safety withstand at least for a
week the trying weather, even during the hottest part of the year. Gly-
corinated lymph should, therefore, be issued during the cold season and
freshly prepared lanoline paste should be used during the hot weather. It
has also been found out that by vaccinating with special varieties of lymph
between the fourth and the sixth day of the incubation period, a person may
more or less be protected from small-pox.
14. Different methods of vaccination.—During 1920-21, the total
number of primary operations performed with lymph direct from calves was
2,110, with lanoline paste 535,354 and with glycerinated lymph 882,573,
against 6,433, 1,050,601 and 589,065, respectively. The percentage of
success under each of these methods was 96.0, 97.7 and 95.8, against 96.96,
97.04 and 96.89. The number of re-vaccinations performed under each of
these methods was 2,111, 370,095 and 534,254 with a success of 53.1, 71.05
and 69.6 per cent., respectively, against 6,517, 919,378 and 614,648 with a
success of 62.16, 72.22 and 60.50 during 1919-20.
15. Inspections.—The Assistant Directors were mostly engaged on
special duties during the year. Dr. Brahmachari, of the Presidency Circle,
and Dr. Ghosh, of the Rajshahi Circle, were able to inspect 605 and 1,137
vaccinations, respectively. The Civil Surgeons saw altogether 38,411 cases,
or 1.6 per cent., of the total operations performed in the Presidency. The
Inspectors and Sub-Inspectors (Assistant Superintendents of Vaccination)
inspected 1,021,035 cases, or 43.8 per cent., of the operations performed.
16. General remarks.—Free vaccination was introduced by the District.
Boards of Rangpur, Chittagong and Tippera during the year, and it was
continued in Burdwan, Birbhum, Howrah, 24-Parganas, Jalpaiguri and
Bakarganj as well as in certain thanas of Bogra and Malda districts. Several
Union Boards in the Dacca district carried on free vaccination in their juris-
diction, while the District Boards of Dacca, Mymensingh, Faridpur and
Noakhali appointed a number of paid vaccinators for the suppression of small-
pox in their districts. During the latter part of the year, the compulsory
Vaccination Acts (V of 1880 and II of 1911) were extended to all the rural
areas in the Presidency administered by District Boards, except in the
districts of Darjeeling and the Chittagong Hill Tracts, where free vaccina-
tion is in force from a long time. It is hoped that substantial progress will
be made during the current year by the local bodies in enforcing the Acts by
establishing public vaccine stations and appointing paid vaccinators. The
Civil Surgeons of Burdwan and Howrah were previously relieved of the
vaccination work in their districts by the Health Officers appointed by
District Boards, while those of Birbhum, Midnapur, Hooghly, 24-Parganas,
Nadia, Jessore, Khulna, Rajshahi, Mymensingh, Dinajpur, Jalpaiguri, Rang-
pur, Pabna, Malda and Faridpur have been so relieved during the current
year.
17. The prescribed statements are appended.
CHAS. A. BENTLEY, M.B., D.P.H., D.T.M. & H.,
Director of Public Health, Bengal.
CALCUTTA;
The 16th December 1921.