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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T able IB —
Immunised in the month of | No. at risk | 1949 | 1950 | Total | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jan. | Feb. | Mar. | April | May | June | July | Aug. | Sept. | Oct. | Nov. | Dec. | Jan. | Feb. | Mar. | Observed | Expected | |||
January | 711 | — | — | — | — | — | |||||||||||||
February | 718 | — | — | — | — | — | |||||||||||||
March | 1,790 | — | — | 1 | — | 1 | |||||||||||||
April | 1,708 | — | — | — | — | — | |||||||||||||
May | 2,030 | — | — | — | — | — | |||||||||||||
June | 1,714 | — | 2 | 1 | — | 3 | |||||||||||||
July .. .. | 2,044 | 2 | 2 | 2 | 1 | 7 | |||||||||||||
August | 2,017 | 3 | 8 | 1 | — | 12 | |||||||||||||
September | 2,224 | 8 | 3 | — | — | 11 | |||||||||||||
October | 707 | 3 | — | — | — | 3 | |||||||||||||
November | 517 | — | — | — | — | — | |||||||||||||
December | 290 | ||||||||||||||||||
Total diagonals observed | 37 | ||||||||||||||||||
16 | 15 | 1 |
Figures in italics are the expected cases calculated from the not inoculated group, see text.