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Calculations show that by the end of 1958 some 73% of children
born between 1st July, 1957 and 30th June, 1958, have been vaccinated.
This is a very satisfactory figure.
SONNE DYSENTERY

Personal hygiene is of the utmost importance in prevention of
spread, especially the washing of hands after use of water-closets
and before eating.
W.C.s should be kept scrupulously clean, seats, chain-pulls
and door handles in particular being frequently washed with
disinfectant.
Schools are naturally associated with the dissemination of the
illness, but without doubt it also spreads rapidly through households
once introduced. It is therefore regarded as a "family" illness
necessitating checking of all contacts. This is readily done in the
laboratory by examination of faeces, but the task of controlling an
outbreak is a major operation calling for close co-operation between
laboratory, medical practitioners, teachers, parents and Public Health
Department staff.
No person who has been a confirmed case (child or adult) is
regarded as reasonably free from liability to spread infection until
three consecutive negative specimens have been forthcoming. There is
much evidence of reversion after two negatives and even of this
occurring more than once with the same patient.
16.