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involving a total of 16 persons, and another 16 isolated cases of food
poisoning concerning persons resident within the Borough.

In 13 other cases no specific organism was isolated.
Paratyphoid
The 5 notifications received concerned two small family outbreaks.
Smallpox
There were no confirmed cases of smallpox in the Borough.
During the year notifications were received from London Airport and
Port Health Authorities in respect of 26 persons arriving in this country
from abroad who were not in possession of valid certificates of vaccination.
Of this total, 20 persons were from areas where smallpox is endemic,
whilst the remaining 6 were from locally infected areas. With the exception
of 5 persons who could not be traced, all were placed under surveillance
for 14 days from the date of their arrival and all remained
free from infection.
International Certificates of Vaccination and Inoculation
Arrangements continued for the authentication by the Medical Officer
of Health of the signatures of doctors on certificates of vaccination and
inoculation for travellers from this country going abroad, as required by
the International Sanitary Regulations. During the year ending December,
1968, over 3,000 vaccination certificates were dealt with.
A.2