I can see it coming. You're about to assume that every single person vaccinated has been exposed and calculate effectiveness based on total infections divided by total vaccinated. Very few vaccinated people are even exposed to the virus or would have been diagnosed with COVID had they not gotten the vaccination. And no one is tracking if they got exposed and infected or exposed and not infected at various time periods post vaccination. The issue is that it wears off and people can't seem to grasp that, which is going to screw everyone when they think they're still immune later during a seasonal surge in cases.246 out of how many vaccinated?
And which vaccines?