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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Table 1C.—
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 | 531 | — | — | — | — | — | |||||||||||||
February | 446 | — | — | — | — | — | |||||||||||||
March | 647 | — | — | — | — | — | |||||||||||||
April | 536 | — | — | — | — | — | |||||||||||||
May | 653 | — | — | — | — | — | |||||||||||||
June | 681 | — | — | — | — | — | |||||||||||||
July | 620 | — | — | — | — | — | |||||||||||||
August | 559 | — | — | — | — | — | |||||||||||||
September | 665 | — | — | 1 | — | 1 | |||||||||||||
October | 485 | — | — | — | — | — | |||||||||||||
November | 522 | — | — | — | — | — | |||||||||||||
December | 361 | 1 | — | — | — | 1 | |||||||||||||
Total diagonals observed | 2 | ||||||||||||||||||
1 | 1 |
Figures in italics are the expected cases calculated from the not inoculated group, see text.