London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
London County Council 1897
[Report of the Medical Officer of Health for London County Council]
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DIPHTHERIA AND CROUP
DIAGRAM showing mean death-rates from Diphtheria and Croup in 1871-5
and successive quin-quennia in comparison with the mean death-rate of
1861-70 taken as 100.
N.B.—The shaded portion of the diagram represents the effect on
the "All Ages" death-rate of the increased incidence of these diseases
on ages 3-10 since 1861-70.