"Even though vaccinations offers protection to individuals against severe hospitalization and death, the CDC reported an increase from 0.01 to 9% and 0 to 15.1% (between January to May 2021) in the rates of hospitalizations and deaths, respectively, amongst the fully vaccinated"
> A substantial decline in immunity from mRNA vaccines 6-months post immunization has also been reported [9]. >Even though vaccinations offers protection to individuals against severe hospitalization and death, the CDC reported an increase from 0.01 to 9% and 0 to 15.1% (between January to May 2021) in the rates of hospitalizations and deaths, respectively, amongst the fully vaccinated [10].
It's referring to an increase in hospitalization/death 6 months after vaccination, compared to when you're first vaccinated. That's very very different from your statement that "countries with higher mRNA COVID vaccine coverage have (slightly) higher covid-mortality than countries with low/lower vaccine coverage".
As I stated in another comment, its hard to draw big conclusions from this data alone. The authors conclude that everyone should get vaccinated despite quickly diminishing returns. Looking a total morbidity in Denmark, I'm just not convinced.