Pfizer vaccine: what an 'efficacy rate above 90%' really means
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There is much confusion about the vaccines being offered for Covid-19. Part of the problem is fake news originating from disparate sources. Problems are also caused by imprecise use of language by the media which doesn't help in understanding the issues.
The Conversation analyses the issues at play and clarifies them here in this linked article. Worth a read, at least for the sake of clarity.
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