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22
the rates are based on the assumption that the occupational distribution of the population
is relatively constant. It is intended to repeat the table in future years, for certain classes
of employment at least, to see if any trend becomes perceptible.
TUBERCULOSIS
MORTALITY AND MORBIDITY 1923-1953
ANNUAL DEATHS PER 1,000 LIVING
ANNUAL NOTIFICATIONS PER 1,000 LIVING
Whooping
cough
An epidemic of whooping cough took place during the year, culminating during
the summer months. It was considerably smaller than that of the winter of 1951-52.
The number of notifications in the year, 11,027 was higher than in 1952 (5,587). The 20
deaths during the year, all under 4 years of age, gave a death-rate of 0.006 and a crude
case fatality rate of 0.18 per cent.
The corresponding rates for the three previous years were :
1950—Death-rate 0.009 per 1,000, case mortality 0.28 per cent.
1951—Death-rate 0.006 per 1,000, case mortality 0.20 per cent.
1952—Death-rate 0.003 per 1,000, case mortality 0.18 per cent.
Infectious
diseases in
schools
The number of cases of various infectious diseases reported from schools in 1953 and
previous years is shown in Table 13 (p. 154).