I can see no hope at present of such a vaccine being produced... I have adopted a frankly defeatist attitude towards the problem of poliomyelitis and I hope that future developments will prove me wrong... No means of controlling poliomyelitis is at present visible.
"Proceedings of the Royal Australasian College of Physicians", vol. 4-6, "Some aspects of the epidemiology of poliomyelitis", 1949.