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37
the fifth after exposure are those in which most secondary
cases occur.
Diphtheria.
46. 204 cases of Diphtheria were notified (excluding 35
cases of mistaken diagnosis), compared with 362, 240, and
147, in the three preceding years. The case-rate (number
of cases per 1,000 population) corrected for cases of mistaken
diagnosis, was 1.68, compared with 1.15 in 1910, 188 in
1909, and 2-15, the average of the ten preceding years.
1 of the cases was bacteriological, i.e., had no symptoms.
47. There were 11 deaths, compared with 15, 25, and 5,
in the three preceding years. The death-rate was 0 09,
compared with 0.20 in 1909, 0.04 in 1910, and with 018,
the average of the ten preceding years. The Woolwich
death-rate is, with the exception of 1910, the lowest recorded
since 1891. The London death-rate was 0.14.
If the Diphtheria death-rate which prevailed from 18961900
had been in operation last year, there would have been
60 deaths from this disease last year instead of 11, the
actual number.