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20
In the remainder of Hackney 43 school-attending cases were
thus distributed:—
20 schools with 1 case attending each sohool 20 cases
5 „ 2 „ „ 10 „
1 „ 3 „ 3 „
2 „ 5 „ „ 10 „
Total 43
It is evident in the former group, that Daubeney Road School
stands out conspicuously, in having an excessive number of
Diphtheria scholars, and the subject requires further examination to
determine the cause of such an incidence amongst the scholars of one
school, over the remaining schools. Confining oneself to these cases,
they were notified in the following order during the prevalence.
During the week ending
Oct. 22nd
1 case.
„ „ „ „
Oct. 29th
3 cases.
„ „ „ „
Nov. 5th
8 cases.
„ „ „ „
Nov. 12th
4 cases.
„ „ „ „
Nov. 19th
11 cases.
„ „ „ „
Nov. 26th
4 cases.
„ „ „ „
Dec. 3rd
1 case.
„ „ „ „
Dec. 10th
4 cases.
36
From this we see that during the period considered there were
a total of 36 cases—23 primary and 12 secondary—amongst the
scholars of the Daubeney Road Board School. The greatest interest
centres around the 23 primary cases, but with respect to the
secondary cases the probability is that most of these were infected
by primary cases in the same house; but this does not exclude the
possibility of some of them being School infected. Confining oneself
to the primary cases, each of these represents one household. In
any enquiry as to the influence of schools, the date of the last day of
attendance at school is of the greatest importance, as the period of
incubation is fairly well known. This period is generally acknowledged
to be from two to seven days, so that any case which has been
absent from school longer than seven days before the initial symptoms
begin, can scarcely be said to be due to infection at school.
Regarding the 23 primary cases, I have ascertained that most of
them showed the first symptoms either on the day of the last