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especially as regards its relation to vaccination. The total
number of cases reported during the epidemic was 1,306; of
these 1,075 were said to have been vaccinated, 160 unvaccinated,
but no information could bo obtained as to the
vaccination in 71 cases. The following table shows that in
proportion to the total number of cases amongst those who
were reported to have been vaccinated, 6.5 per cent. occurred
amongst children under five years of age, the proportion of
population at that age being 12.9 per cent. of the whole. That
at the age period of 5-10 years the vaccinated cases were 10.9
per cent. against 11.1 per cent. of population; that at 10-15 years
of age the percentages were 16.0 of cases against 10 of population;
at 15-25 they were 33.9 and 20.4 respectively; at 25-35
years of age there were 192 per cent. of cases and 15.8 per cent.
of popidation; at 35-45 years there were only 8.8 per cent. of eases
to 11.5 per cent. of population living at that age period. Above
45 years of age there were 18.3 per cent. of population against
4.7 per cent. of cases. I think these figures show most conclusively
that unless children have three or more good vaccination
marks, they should be re-vaccinated at or before 10 years of
age ; indeed I think 7 years is, under these ciroumstances, by no
means too early. The greatest proportion of cases amongst the
unvaccinated occurred during the first five years of life, as no less
than 49.4 per cent. of the total cases amongst these persons
reported to me occurred at that age period, whilst 20.6 per
cent. happened between 5 and 10 years of age, making 70
per cent. of the whole amongst children under 10 years of
age. The contrast of 49.4 per cent. of all the cases amongst
the unvaccinated at 0—5 years of age, against 6.5 at the same
age amongst the vaccinated, is very striking.