"I must have missed the bit previously where vaccines were advertised as x% effective if you exclude mild cases."
It seems likely that the original Chinese figures would have included mild cases but not those who displayed no symptons. The Brasilian figures seem to have included those without symptoms.
In effect it may well be that both figures are "correct". It shows the danger of comparing results without being absolutely sure your are comparing like with like
Last edited by: CGNorwich on Wed 13 Jan 21 at 16:46
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