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]
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London.
Diagram IV.
Notified Cases of Infectious Disease
(14 years: 1890—1903).
The mean fine represents an average week/y number of22 cases
The mean fine represents an aver-aye weekly number of S3 cases