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32, Table III gives the age distribution, the number in
each parish, and the number removed to hospital. Woolwich
Parish was most affected.
33. Deaths. There were four deaths, giving a death-rate
of 0.03 per cent compared with 0.06, 0.03, and 0.01, in the three
previous years, 0.08 in the five years 1908-12, and 0.19 in the
ten years 1891-1900. The death-rate in London was 0.03 compared
with 0.02 in 1917. The case mortality (or deaths per cent of
notifications) was 1.8 compared with 1.3, 1.4 and 1.7 in the
three preceding years.
34. Hospital Isolation. Of the 222 cases notified, 189
(or 85 per cent) were removed to one of the fever hospitals,
compared with 90, 88, 85, 91 and 85 per cent, in the five preceding
years.
35, HOME ISOLATION. 21 certificates of efficient home
isolation were given to enable men to continue their employment
in the Arsenal, and so obviate unnecessary removal to hospital,
compared with 15, .18, and 6, in the three preceding years.
In the Annual Report for 1911 a comparison was made
between home and hospital isolation, showing that, whereas there
were only 1.6 per cent of failures in home isolation, there were
4.6 per cent in hospital isolation. Failure means the occurrence
of seoondary cases attributed to the primary case.
36. The Annual Report for 1905 contained a special report
on a statistical investigation into school incidence of scarlet
fever and diphtheria during the ten years 1896-1905.
DIPHTHERIA.
37. 208 cases of diphtheria were notified (excluding 32
oases of mistaken diagnosis). The case-rate (number of cases
per 1,000 population), corrected for oases of mistaken diagnosis ,
was 1.42 oompared with 1.77, 1.81 and 1.65 in the three preceding
years, and 1.99, the average of the ten years 1901-10. This
is the lowest case-rate recorded since 1910.
38. There were 25 deaths, compared with 11 and 16 in 1916
and 1917. The death rate was 0.17 compared with 0.26, 0.15,
0.08 and 0.11, in the four preceding years.
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