4
REPORT OF THE KING INSTITUTE, GUINDY
13th February 1926 by the Director of Public Health. A recent analysis of the
results for the last three years in all districts suggests, that the best off-season
would be March to June for all districts except the southern districts of Trichino-
poly, Tanjore, Tinnevelly, Madura and Coimbatore where the period April to July
would be best.
7. Quantity issued.— The total issued this year is 2,216,038 " cases " as
compared with 2,224,080 last year and 2,184,590 the previous year. Thus the
output has been practically constant in the last three years. Table II gives
details of the recipients. There is nothing noteworthy except a slight decrease
in the amount taken by municipalities.
8. Amount unaccounted for.—Details are given in Table III. The percentage
of total lymph unaccounted for this year is 16 . 7 per cent as compared with 21 . 9 per
cent last year, which is a decrease of 5.2 per cent. Now these figures here and
in previous reports have been based on the total lymph issued, including that
bought by other Governments and private bodies who do not send their results
here, as is obvious from the high figure in Table III, 97 per cent, for the lymph
unaccounted for that was supplied to "other bodies." Since what the Govern-
ment is interested in is only the results for lymph issued to official and semi-
official bodies in this Presidency, the figures for other bodies should be excluded
to get the percentage that is wanted. The figures for the " official " unaccounted
for percentage are 11.3 for this year and 18.1 for last year. In the following
districts the percentage unaccounted for exceeds 10 per cent (and also exceeds
t he " offi ci al " average of 11. 3 per cent ) : —
Ramnad ...
...
. . . 44 per cent. Vizagapatam
...
... 15 .6 per cent.
Chingleput
...
... 36
,,
Guntur ...
...
... 15 .1 „
Cuddapah...
...
... 18.8
,,
Tanjore . ....
. . .
14.9
„
Bellary ...
...
... 16
,,
Kurnool ...
...
... 12 .5 ,,
Ganjam ...
... ... 15 .8 ,,
Tinnevelly
...
... 12 .0 „
9. Type of vaccination.—The number and types of vaccinations carried out
in the Presidency are as follows :—
No.
Type.
Total number
of cases of
lymph issued.
Percentage of
each type to
total lymph
issued.
Percentage of
each type to
total returns
received.
1 Primary
...
...
...
...
1,219,848
55.0
72.4
2 Secondary ...
... ... ...
91,857
4.1
5.4
3 Revaccination
...
...
...
373,262
16.8
22.2
4 Results unknown in types (1), (2)
and (3)
...
163,178
7.4
. . .
5 Lymph unaccounted for ...
..
371,041
16.7
Total ...
2,219,186
100.0
100.0
*A secondary vaccination is one done on a person who not having had smallpox, has failed to " take " at his
primary vaccination.
A revaccination is one done on a person who has been previously successfully vaccinated or who has had
smallpox.
. 10. Primary vaccination.—The case success rate for the year is 96 .4, and the
insertion success rate 88 . 8. Last year's rates were 96 .7 and 90.1, respectively, and
for the previous year 91 . 7 and 78, respectively. The case success rate is the
chief criterion of the potency of a lymph issued, for the insertion success rate
though useful is much more liable to fluctuation from other causes such as varia-
tion in the skill of vaccinators. Since this year's case success rate (96.4) is
practically the same as last year's rate (96 . 7) we conclude that the standard of the
potency of lymph has been maintained.
The monthly success rates are given in Table IV. The worst month was
April with case and insertion success rates of only 91 3 per cent and 78.3 per cent,
respectively. The figures for May, June and July appear good, but, seeing how
few vaccinations were done, the results are not comparable with those for other
months. for the great factor in lack of success is deterioration of vaccine after