Rubbish! The tweet below tells the story of breakthrough polio cases after vaccinations.
The reason that it has since been basically eliminated is that nearly everybody quickly
got vaccinated achieving herd immunity. In the USA for Covid by comparison only low 60s%
have been vaccinated and herd immunity not achieved. Once over 90% of our population
receive their boosters then we will be well on the way of herd immunity for this Covid disease.Tweet
See new TweetsConversation
Breakthrough cases of polio—including deaths—were common during early polio vaccination. What kept us safe was not perfect vaccine efficacy. It was that Americans quickly & massively stepped up to get the imperfect vaccine, quashing transmission. From: https://ncbi.nlm.nih.gov/pmc/articles/P1919968/?page=8
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NSW - 34 DEAD - 25 fully vaccinated, page-293
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