- US officials announce that 95% of new Covid cases are in unvaccinated persons.
- UK officials announce that 60% of new Covid cases are in unvaccinated persons.
The conclusion based on US figures is that fully vaccinated persons are very unlikely to contract Covid, and therefore the vaccines are highly effective.
The conclusion based on UK figures is that fully vaccinated persons are still relatively likely to contract Covid, though they are unlikely to die of it, so the vaccines are moderately effective.
But why the discrepancy? In the US, Pfizer, Moderna, and J&J vaccines are used. In the UK the same vaccines are used, but Oxford/AstraZeneca vaccine is used as well. So there are two possible explanations for the different results:
- The vaccines used in the UK are less reliable than the vaccines used in the US.
- The statistics in the US are less reliable than the statistics in the UK.
I have insufficient data to decide between these two possibilities. How about you?
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