@MRex just to remind you of your original comment and the one I was replying to:
From tomorrow, day 22, until my next vaccine on 7th June it has 76% efficacy.”
Your individual vaccine does not have 76% efficacy for you (for a start you’re using efficacy incorrectly - you are not in a clinical trial).
I didn’t say the 24% had no protection. I said they didn’t have the same protection as the other 76%, based on whatever threshold was used.
It’s not quite as simple as that because it’s actually calculated as a reduction in risk but, regardless, no, your vaccine does not have ‘76% efficacy’ in you.