Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Report on vital statistics and sanitary work for the year 1898
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More than three cases were also reported from each of the following streets : —
Cases, 43. Houses attacked, 31.
The streets comprise 1,090 houses (approximately.)
Had there been the same prevalence of disease in
the second as in the former group, some 60 cases
would have been recorded there in lieu of 43.
In compiling these lists, the occurrence of more
than three cases in the year was the only factor considered.
Allusion has already been made to the
prevalence of diphtheria in Willesden, and it does not
appear to be unreasonable to attribute some of the
special incidence on the streets of the first list to
infection acquired in or imported from that District.
The frequency of secondary cases is shown by the following statement: —
An analysis of the cases from houses having
more than one case shows that the infection was spread
by personal contact with the first, or preceding,
patients. There is no evidence, as far as this disease