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(2) Another school which had yielded 29 per cent. Schick positive
in April, 1936, after one dose A.P.T. showed on May 5th, 1937,
5 Schick positive amongst 40 previously negative, i.e., a relapse
rate of 12.5 per cent., but none amongst 15 who had been given
a second dose 0.25 c.c. A.P.T. following their first positive posterior
Schick.
In the light of this experience it was decided in the new school
year, i.e., September, 1937, to revisit all Infant and Mixed Departments
and to offer a further dose to those children only previously
immunised with the single dose method, and to use the two dose
method (0.25 c.c.—14 days—0.5 c.c.) in all cases, but omitting
the posterior Schick tests.
Up to the end of the year seven schools had been visited and
450 new cases were done and 50 new cases of pre-school age who
were brought by the parents by invitation.
By this method it is hoped to secure as many acceptances as
with the old method and at the same time to obtain a better and
more lasting immunity.
The weekly immunisation clinic was continued on Tuesday
afternoons, and as far as possible all children over five years are
Schick tested after immunisation in order to control the efficiency
of the prophylactics used. Pre-school children who have been
protected are advised to return for a Schick test shortly before being
admitted to school. By this means, in future years, it is hoped
to gain valuable information as to the permanency of immunity
following the use of A.P.T.
Scarlet Fever Immunisation,—Dick Tests for Scarlet Fever.—
Positive, 31; Negative, 38. Total 69.
One child at Brookfield Hospital was immunised.