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 Islington, Metropolitan Borough of]
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Showing the cases of DIPHTHERIA (including Membraneous Croup) notified in each week in 1912, and the averages
for the corresponding weeks in the ten years 1902-1911.
RED LINES = Weekly Notifications.
GREEN LINES = Ten years' averages.