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
London County Council 1957
[Report of the Medical Officer of Health for London County Council]
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Table (vi)—Spread of specific infection—Index of spread (both nurseries combined), 1st January, 1955, to 31st December, 1956
| Disease | Total number of primary cases (a) | Total number of secondary cases produced (b) | Index of spread (Col. 2) (Col. 1) |
|---|---|---|---|
| (1) | (2) | (3) | |
| Chicken pox | 3 | 5 | 1.7 |
| Common cold | 48 | 19 | 0.4 |
| Gastro-enteritis | 57 | 27 | 0.5 |
| Glandular fever | 3 | 5 | 1.7 |
| Influenza | 3 | 4 | 1.3 |
| Jaundice | 2 | 1 | 0.5 |
| Measles | 8 | 30 | 3.8 |
| Pneumonia | 21 | 5 | 0.2 |
| Sonne dysentery | 24 | 56 | 2.3 |
| Tonsillitis | 51 | 32 | 0.6 |
| 220 | 184 | 0.8 |
(a) Includes a score of one for unknown primary introductions from which secondary cases resulted and includes primary
cases introduced during the course of an epidemic which in Table (v) have been counted as part of one outbreak, hence
these figures exceed the numbers of outbreaks ' by this amount.
(b) Refers only to those secondary cases which occurred within the period between the minimum and maximum serial
interval after a known or unknown primary case.