Even if that were true, that's a much lower rate per person vs. than the unvaccinated, given the very high vaccination rate in England.
And they use AZ mostly in England, which is not approved for use in the US.
Covid vaccine: How many people are vaccinated in the UK? - BBC News
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It's not primarily AstraZeneca they are using - you just made that up.
https://www.nhs.uk/conditions/coronavirus-covid-19/coronavirus-vaccination/coronavirus-vaccine/
The COVID-19 vaccines currently approved for use in the UK are:
You cannot usually choose which vaccine you have. When you book, you'll only be offered appointments for vaccines that are suitable for you.
Most people can have any of the COVID-19 vaccines, but some people are only offered certain vaccines.
For example:
You should have the same vaccine for both doses, unless you had serious side effects (such as a serious allergic reaction) after your 1st dose.
However, with 1,108,306 cases among the vaccination population during the same time frame, and 15,191 hospitalisations, the case-hospitalisation rate among the fully vaccinated is 1.37%.
This seems pretty clear to me. Your Rate-per-person argument has no meaning when the total number of vaccinated and unvaccinated are identified and reported in the same time frame with the number of hospitalizations for each group as above.