I agree with this. The percentage of the vaccinated is a good start, but it does not explain everything.Given the information at hand, maybe, just maybe... there're other factors beyond whether a person is vaccinated or not, whether he's healthy or not that have significant impact on the severity level of the pandemic that a country experiences?
I think there are different reasons for different countries. If we had all the answers, we'd be able to deal with the pandemic.
This chart has been circulating today. If the data behind it is correct, it shows that the vaccines definitely work in preventing covid deaths. But it also shows that there are some outliers, like Latvia and Slovakia: