Are the figures not skewed as people get flu jabs hence the overall numbers are artificially reduced? Seems to me it's not comparing like with like.
Aside from the fact that percentages really don't have much significance if you get it, I don't really see that a difference of a few percentage points is that significant anyway, especially as the amount of cases the percentages are based on must be vastly different in size. I don't think a few thousand is a very big sample for accurate prediction.
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