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 notified in each week in 1914, and the averages for the corresponding weeks
in the ten years 1904-1913.
Red Lines = Weekly Notifications.
Green Lines = Ten years' average.