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19
effective vaccination. That a sort of vaccination is
very frequently performed, but without effect, there
can be on doubt; for, in the course of the last
thirteen years, I have caused inquiries to be made
into the particulars of 1,555 cases of small-pox in the
City, and have been told that in 1,150 of them
vaccination had been performed in infancy with
success. This is in the proportion of 73.9 per cent. of
all the persons attacked. At the Small-pox and
Vaccination Hospital at Upper Holloway the proportion
is 79.3 per cent. of all the cases admitted
since the year 1854; and at the three hospitals of
the Metropolitan Asylum District it ranged from
59.2 per cent. at Homerton, to 80.5 per cent. at
Hampstead—the average for the whole of the
patients in all the Hospitals in 1871 being 74.8 per
cent. It is also worthy of note that the proportion
of cases in which vaccination had been performed
has been steadily advancing during the last 20 years;
for, according to the returns of the Small-pox Hospital,
Upper Holloway, it appears that during the
sixteen years which terminated with 1851 ,the average
number of vaccinated cases was only 53 per cent. of
all the patients admitted, whereas in the epidemic
years of 1854, 55 and 56, it amounted to 71 per cent;
in 1859-60,it was 78 per cent.; in 1862-66, it was
81 per cent.; and in 1871, it was 91.5 per cent.