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91
No sanitary district was immune, although Bow West District
suffered least, the chief centres of infection being Bromley North, Bromley
Central, West Combined and Bow East Districts. The number of cases
in each Sanitary District was as follows:—
East Combined 53
West Combined 105
Poplar South (East) 23
„ „ (West) 22
Bromley North 194
Bromley Central 105
Bow East 96
Bow West 30
628
The incidence of Smallpox in houses is shown below.
Cases.
186 houses in which 1 case of Smallpox occurred
186
49 „ „ 2 cases „ „
98
40 „ „ 3 „ „ „
120
16 „ „ 4 „ „
64
15 „ „ 5 „ „ „
75
6„ „ 6 „ „ „
36
4 „ „ 7 „ „ „
28
1 house „ 8 „ „ „
8
1 „ „ 13 „ „ „
13
Total
628
Total number of cases 628
„ „ houses 318
In Table II it will be seen that of the 628 cases no less than 537 were
unvaccinated, and that in this group nearly 95 per cent. of the cases
occurred before the age of 35; whereas in the vaccinated group, almost all
the cases occurred after the age of 35. The vaccinated cases were vaccinated
once only—in infancy—except one patient who was stated to have been
re-vaccinated during the South African War, 1899-1901.