Research supports a relationship between immunizations and onset of paralytic poliomyelitis.
The relation of prophylactic inoculations to the onset of poliomyelitis: a study of 620 cases in the victorian epidemic of poliomyelitis in 1949.
McCloskey, BP. Medical Journal of Australia, 1951 Apr 28;1(17):613-8.
“Evidence is presented that in the current epidemic of poliomyelitis in Victoria
there has been a relation, in a number of cases, between an injection of an
immunising agent and the subsequent development of paralytic poliomyelitis.”