In August 2021 18% of COVID deaths were among the vaccinated
which means that vaccines work well. Because the remaining 82% were not vaccinated. If you consider how many millions are vaccinated and how few the not vaccinated are......you have the full answer.
Infact if you suppose 100 deaths in August 2021, 18 is the number of vaccinated and 82 the number of not vaccinated. Now divide 18 for the many millions of vaccinated and 82 for some thousands of not vaccinated and then
compare the two numbers that come out
I was speaking of the US - as I recall the overall vaccinated rate in August 2021 was around 60% and 6 months later probably 70-75% with the Biden work mandate. 82% unvaccinated was probably Jan 2021.