[SmokingJoe]

It is difficult, if not impossible, to obtain comparable vaccinated numbers,

What's difficult about it?
It's very easy and straightforward. And these are vaccinated numbers. The British NHS give out these figures regularly m

particularly for something vague like the last 7.5 months.

7.5 months is “vague”?
Since when?
That's over half a year.
It's not vague. It's very substantial and telling.

[alternatives?]

What is the starting date of the 7.5 month period so the numbers are comparable?