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.

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Notes from Wikiquote

Quote from 1949 on the development of a poliomyelitis vaccine, which was developed later that year.

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Quote text and notes from Wikiquote: Frank Macfarlane Burnet (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.