Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for London County Council]
Rejport of the County Medical Officer—General.
It should be borne in mind that the case-rate and case-mortality may be affected by variations
in the extent of use of bacteriological methods of diagnosis, the effect of which is to increase the
notified number of clinically mild cases of the disease.
|Period.||Death-rate per 1,000 persons living.||Case-rate per 1,000 persons living.||Case-mortality per cent.|
The death-rate in each year since 1858 in relation to the mean death-rate of the period 18591912
is shown for diphtheria and also for diphtheria and croup combined in diagram (M).
The monthly case-rate and case-mortality in each of the years 1891-1912 in relation to the mean
of the period is shown in diagram (0).
|Metropolitan borough.||Notified Cases, 1912 (52 weeks).||Case-rate per 1,000 persons living.||Deaths, 1912 (52 weeks).||Death-rate per 1,000 persons living.|
(a) The Infectious Disease (Notification) Act came into force in 1889. (h) See footnote (c), page 4.