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28
1926]
Diphtheria was responsible for 743 cases of illness, which were (153) below
the average (896) of the preceding ten years. The attack rate was equal to 2.19
per 1,000 of the civil population annually, and was 0.58 below the mean rate (2.77)
of the decennial period.
In London the attack.rate was 2. 97 per 1,000, and the Encircling Boroughs
2.56.
Scarlet Fever.—1,010 cases were notified, and they showed a decrease of
125 on the average (1,135) of the ten years 1916.1925. The attack.rate was equal
to 2.98 per 1,000 of the civil population annually, which is a decrease of 0.52 per
1,000 of the mean rate (3.51) of the preceding ten years. In London the attack.
rate was 2.69 per 1,000 of the civil population, while in the Encircling Boroughs
it was 2.81.
Enteric Fever.—Only 18 cases were notified, which equalled the average
that obtained during the ten years 1916.1925. The attack rate was 0.05 per
1,000 annually, or 0.01 per 1,000 below the mean rate (0.06) of the last ten years
In London the rate was 0.06, and in the Encircling Boroughs 0.05 per 1,000
of the civil population.
Typhus Fever—No case was notified.
Puerperal Fever.—See page 12.
Erysipelas.—'118 cases were notified, or 24 below the average 142 of the
preceding ten years, the attack.rate being 0.35 per 1,000 of the civil population.
FATALITY FROM THE EIGHT PRINCIPAL NOTIFIABLE
INFECTIOUS DISEASES.
By "Fatality" is meant the percentage proportion of deaths to attacks of
sickness.

* Including 2 cases not notified, † Includes 1 case not notified.