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62
Encephalitis Lethargica.
A child of 9 died from encephalitis lethargica which he had
contracted 4| years previously. For this period, mental symptoms
had been in evidence, and he had suffered from an inverted sleep
rhythm.
Smallpox.
Only two cases of smallpox were notified in the course of the
year. The origin of one was unknown but the other was secondary
to a ease which had been diagnosed as one of chickenpox.
A total of 511 visits were paid to the homes of smallpox
contacts by the Sanitary Inspectors. Visiting is continued to the
19th day from the last exposure to infection.

No vaccinations were performed during the year by the Medical
Officer oi Health under the Public Health (Smallpox Prevention)
Regulations, 1917.
Measles.
In the early months of the year, the district was visited by
an extensive outbreak of measles. During the months February
to April, the disease accounted for nine deaths of children, of whom
was one under 12 months of age, two were 1 vear, three were 2
years of age, two were 5 years and one was 6 vears of age. A
number of cases suffering from complications were removed to the
Isolation Hospital.
The following figures were ohtained during this outbreak of
measles. As the disease is not notifiable locally, the fact that
the information was obtained largelv from the school authorities
renders it probable that the returns are not absolutely accurste
and that not all the cases believed to be such were actually measles:
nor do these figures necessarily include all cases affected during this
time.