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42
Of more importance are the ages of those who have been immunized.
In the 14 months November, 1932 to December, 1933,
the ages were as follows:—
Under 5—406.
5-7—619.
7-15—1678.
In 1934 the ages of those who were immunized were as
follows :—
Under 5—328.
5-7—377.
7-15—203.
It will be seen that the relative number under 5 who were
immunized was much higher than in the first year. This is due to
the fact that we have been concentrating upon the lower ages.
At the end of 1933 the percentage immunized in the infants'
departments was as follows:—
AAV. 24.3 J.P. 63.1
B.P. 64.7 P. 43.1
B. 37.6 R. 35.5
D. 75.3 S. 58.8
At the end of 1934 the figures were as follows :—
AAV. 44.6 J.P. 58.0
B.P. 52.9 P. 50.0
B. 24.9 R. 33.8
D. 51.4 S. 52.3
It has been previously explained that artificial immunity is
only gradually developed in the inoculated. It has been claimed
for some of the immunizing materials—such as Alum Toxoid—that
immunity can be obtained from one dose. As previously explained
we have not used Alum Toxoid because of the risk of local reactions.
In the case of Formol Toxoid and T.A.M. three injections of the prophylactic
are needed to develope gradually an immunity against
diphtheria. It is estimated that about 95% of the schick-positives
become schick-negative in less than six months after inoculation.
In 1933, 8 cases occurred amongst those who had had one
inoculation. Of these one died, two were severe, 3 were mild and
2 were carriers only.
In 1934,4 cases occurred amongst those who had had one inoculation.
All these were mild attacks.