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37
Diphtheria Immunisation.
The details of this scheme were given in my report for 1935.
There has been 110 alteration in the procedure.
Below is a table setting out the work, and the results that have
been achieved during 1937.

In addition to the above, during the same period, approximately
124 persons received injections from private practitioners, making
a grand total of 739 persons who have received injections under the
scheme.
Post Schick Test.
Number of Schick Test Injections given at the
Clinics, including Control Injections =1,053
Number who have received such injections at the
Clinics - 540
Percentage found to be immune after receiving 3
immunising injections =97.9
Those found to be Schick Positive after 3 immunising injections
have been given a 4th immunising injection, which has been found
to render them Schick Negative.
Some of the adolescents received 4 immunising injections in the
first instance instead of 3 in order to minimise sensitivity. In those
cases the first injection consisted of 0.5 c.c. of material instead of lc.c.
In connection with this work, my best thanks are again due to
the teachers of the various schools for their willing co-operation, and
for the enthusiasm which they have shown.