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26 minutes ago, PhilGeis said:

The (very) older folks may remember initial polio vaccination in US - 1st the injected Salk and the later, sugar-cubed Sabin. Neither went without issue.

https://pmc.ncbi.nlm.nih.gov/articles/PMC1383764/pdf/0156.pdf

What point are your trying to make ?

Yes I remember the polio vaccines, but the mid 20th century was hardly 'early' ; you have to go back another 150 years for that to Edward Jenner in 1796.

48 minutes ago, studiot said:

What point are your trying to make ?

Yes I remember the polio vaccines, but the mid 20th century was hardly 'early' ; you have to go back another 150 years for that to Edward Jenner in 1796.

Says an old man. )

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