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37
The other three cases occurred in Blackwall Lane, and were
the means of spreading the disease to the surrounding streets.
Mrs.—, who was vaccinated in infancy, appears to have
taken the disease first, and had such a mild attack that she did
not recognize it, and went about her work as usual.
In a short time two of her young children (who were unvaccinated)
took it, and it was not till they were far advanced in
confluent Small Pox that she sent for a doctor.
These cases were at once removed to Hospital, and one of
them died the next day.
In a short time 75 cases were reported as occurring in the
streets adjoining Blackwall Lane, principally amongst children
attending the Board School in that locality, many of which could
be traced to the Blackwall Lane cases.
I at once communicated with the Medical Officer to the
London School Board, and during the Easter holidays the School
was fumigated by the disinfector.
I also notified every case to the Board of Guardians through
their Vaccination Officer, and also examined many of the school
children to see if they had been vaccinated during infancy.
In one School alone I found 34 children, and in another 27,
without any visible mark of Vaccination.
It was found that, in the majority of cases, the unvaccinated
child first contracted the disease, and then brought it home and
infected the other members of the family, many of whom had
been vaccinated. These latter cases were of a mild type.