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36
upon the genuine cases notified during 1910. On reference to
the chart accompanying this report it will be observed that
a slight rise in the incidence of scarlet fever occurred in the
third week of July, the week before the summer school vacation,
and again in the first week in August (the schools closed on the
26th July) falling again to a very low point during the next two
weeks. During the last week of August a rise again took place,
which continued at intervals to increase until the disease reached
its highest point in the third week of October, after which it
gradually declined, with one interval of increase until the end of
the year. It will be seen that the excess of cases occurred almost
immediately after the summer holidays, and justifies the presumption
that school influence played a considerable part in causing an
increase. The attack rate for 1911 is, therefore, 2.6 per 1,000 persons
living.
The number of cases of scarlet fever removed to hospital
during the year was 552. This is equal to 90 per cent. of the total
notified.

It will be seen from the above that scarlet fever was most prevalent
in the central and south-east sub-districts, especially in the
former.
The deaths from this disease during the year numbered 10,
which is equal to a mortality rate 16 per 1,000 attacked and .04