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As a result of scrutiny of the clinical and virological findings, a final diagnosis was made
in respect of each notification. The diagnosis of paralytic poliomyelitis was made on clinical
grounds, although virological confirmation was present in the majority of cases. A diagnosis
of non-paralytic poliomyelitis was made only in cases in which poliomyelitis virus was
present in the stool, or when serological evidence supported the diagnosis. Table (xii) gives
an analysis of the original notifications according to the final diagnosis.

* includes 1 case, diagnosis not known
It will be seen that out of 139 cases notified as paralytic eight proved to be non-paralytic
or not poliomyelitis (including one case where the true diagnosis was not known) and that,
out of the 67 cases notified as non-paralytic, ten proved to be of the paralytic form and
24 were not poliomyelitis. Thus, on balance, the original notifications slightly understated
the extent of the paralytic form—139 against 141—and there were 29 cases which proved
to be not poliomyelitis (including the one not known). The vaccinal state of the 141 cases
finally diagnosed as paralytic poliomyelitis and the 36 non-paralytic cases is set out in
table (xiii).

* One, two or three injections
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