London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Heston and Isleworth 1934
[Report of the Medical Officer of Health for Heston and Isleworth]
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| Age | Remaining Schick Negative | Reverted to some degree of Schick positive | Percentage of reversion | Total cases |
|---|---|---|---|---|
| 1 | 24 | 2 | 7.6 | 26 |
| 2 | 21 | 0 | 0.0 | 21 |
| 3 | 23 | 2 | 8.0 | 25 |
| 4 | 27 | 1 | 3.5 | 28 |
| 5 | 40 | 5 | 11.1 | 45 |
| 6 | 47 | 5 | 9.6 | 52 |
| 7 | 49 | 4 | 7.5 | 53 |
| 8 | 53 | 3 | 5.3 | 56 |
| 9 | 32 | 2 | 5.8 | 34 |
| 10 | 10 | 1 | 9.0 | 11 |
| 11 | 5 | 0 | 0.0 | 5 |
| 12 | 6 | 0 | 0.0 | 6 |
| Total all ages | 337 | 25 | 6.9 | 362 |
Attention was next directed to a study of the permanency of the Schick-negative state in
naturally immune subjects.
Only 60 cases have been collected for this purpose at an average of 3 years from the time
at which they had been found originally to be naturally Schick-negative.
The results obtained were as follows:—
43