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83
Public Health (Smallpox Prevention) Regulations, 1917.
No vaccinations were performed by the Medical Officer of
Health under the Public Health (Smallpox Prevention) Regulations,
1917.
Diphtheria.
The attack rate per 1,000 population decreased from 1.63 in 1935
to 1.48 in 1936, there being 44 less cases, while the case mortality
per 100 was raised from 3.50 to 3.63.
The Council's two diphtheria prevention clinics continue their
useful function and are well attended. The number immunised is
still too small a proportion of the population to influence materially
the incidence of the disease apart from the closed communities
in the residential schools, from which diphtheria has been conspicuously
absent since immunisation there was completed several
years ago. One case from a residential school was notified and
removed to hospital as diphtheria, but was diagnosed there as
tonsillitis in a temporary carrier. For the past two years one
clinic has been using alum precipitated toxoid, while at the other
toxoid antitoxin mixture with which both clinics started in 1928
has been the prophylactic.
A comparison of the following numbers immunised indicates the
different degrees of efficiency of the two materials, the retest for
immunity being carried out four to five months after the original
test.
Retest after two
injections of
A.P.T.
Positive 19
Negative 392
Retest after three
injections of
T.A.M.
Positive 20
Negative 294