What do Danish health authorities know about boosters and bivalent C19 mRNA injections that the FDA/CDC either doesn't or chooses not to?

From here:

Vaccination against covid-19 - Danish Health Authority (sst.dk)

https://www.sst.dk/en/English/Corona-eng/Vaccination-against-COVID-19

“..we recommend vaccination of people aged 50 years and over as well as selected risk groups.”

“Why are people aged under 50 not to be re-vaccinated?

With the autumn vaccination programme, we aim to prevent serious illness, hospitalisation and death. The risk of becoming severely ill from covid-19 increases with age. Therefore, people who have reached the age of 50 and particularly vulnerable people will be offered vaccination. We expect that many people will be infected with covid-19 during autumn and winter. It is therefore important that the population remembers the guidance on how to prevent infection, which also applies to a number of other infectious diseases.”

Exceptions are made for the vulnerable who are under 50. Though I struggle with the concept of injecting anyone, ESPECIALLY the vulnerable, with instructions to make a deadly toxin. I remain in the camp that is unconvinced that “protection from one type of poisonous snake bite by preventing a response from any other snake bite = get that particular snake to bite you in advance of MAYBE getting bitten by that particular poisonous snake, as it MIGHT protect you from all other types of poisonous snake bites”.

Synopsis of Denmark’s C19 “experience” v the US

Out of interest, Denmark has “tested” its population more than 22.1 times per capita, the US 3.4 times.

Enquiring minds might want to know why the US has more than 4 times the case fatality rate as Denmark and why the US has 5 times more “active” cases.

No doubt the FDA/CDC have been in constant contact with Danish health authorities, closely co-ordinated and facilitated by the WHO (not!).