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One was vaccinated in infancy and 32 years ago, the
remaining three were doubtful. The ages of the doubtful
cases were 10½, 50 and 60. None proved fatal.
No child under 10 years of age that had been vaccinated
in infancy, and no person over 10 years of age that had been
re-vaccinated within the previous ten years, contracted Small
Pox.
Of the 22 persons between 10 and 20 years of age that had
been vaccinated in infancy not one proved fatal.
Of the 45 unvaccinated persons under 20 years of age
attacked, 11 proved fatal—or nearly 25 per cent.
The death rate at all ages among those vaccinated in
infancy only was 14.4 per cent., and 29.1 per cent. among
those that had never been vaccinated.
4
As soon as a case of Small Pox was notified to me, I
visited the premises and made inquiries as to the source of
infection. The names of all the children were taken and the
schools communicated with. The names of the employers of
all those that had been in contact with the patient were
written to, and were kept under observation for 14 days. The
names and addresses of persons that had visited the premises
were also obtained, and the Medical Officer of Health for the
district was informed. I personally visited the houses, and
examined all the persons living in the house at least twice a