US data is unfortunately unusable. Hospitals routinely classify anyone they don't have data on as unvaccinated and they don't have data much of the time. Germany pulls the same trick, it was covered in a national newspaper and they didn't change it. Public health is utterly corrupt, you have to work very hard to find data that is slightly less corrupted than normal.
In the UK data quality is better than normal for some reason, perhaps due to the nationalized healthcare system making it easier to set consistent standards. And there the majority of COVID patients in hospital are vaccinated according to the ICNARC audits. It's not a big majority but it's there, and this is not confounder/game-playing free data either. They keep classifying people as unvaccinated for quite some time after their first shot for example, which is problematic because there's some evidence people are more likely to get infected immediately after their first dose. But that gets added to the unvaccinated side of the ledger. There are other problems e.g. people have to go to hospital to be hospitalized, but they tell vaccinated people they're protected from hospitalization, then declare victory when those people don't turn up. Given how marginal many cases are (they may or may not really need to be there but you can't know what would have happened in the alternative case), this is a form of circular reasoning.
Nonetheless it'd be weird if the USA and Germany were radically different to the UK in this regard.
In the UK data quality is better than normal for some reason, perhaps due to the nationalized healthcare system making it easier to set consistent standards. And there the majority of COVID patients in hospital are vaccinated according to the ICNARC audits. It's not a big majority but it's there, and this is not confounder/game-playing free data either. They keep classifying people as unvaccinated for quite some time after their first shot for example, which is problematic because there's some evidence people are more likely to get infected immediately after their first dose. But that gets added to the unvaccinated side of the ledger. There are other problems e.g. people have to go to hospital to be hospitalized, but they tell vaccinated people they're protected from hospitalization, then declare victory when those people don't turn up. Given how marginal many cases are (they may or may not really need to be there but you can't know what would have happened in the alternative case), this is a form of circular reasoning.
Nonetheless it'd be weird if the USA and Germany were radically different to the UK in this regard.