Normally we know how many people are vaccinated because we counted them. Are you sure that this 8.5% is the correct figure though? How big could be the possible

Normally we know how many people are vaccinated because we counted them. Are you sure that this 8.5% is the correct figure though? How big could be the possible error here? How big is omicron prevalence in Denmark? ECDC data appears to be way outdated. It can be possible that unvaccinated catch the Delta first for some reason. Perhaps because Delta is still more prevalent and does not affect vaccinated so easily but omicron does. Behavioral changes may also explain some of the difference. If the testing has been mandatory for long time, I would expect some testing fatigue to appear resulting in lower social activity for unvaccinated. Are there recent seroprevalence studies available? How many from the current unvaccinated population are still uninfected? Previous infection may offer still reasonably good protection against omicron regardless of lower laboratory neutralization activity. Of course there is also possibility that vaccinated are more affected by omicron but I would then not expect the third dose to increase the protection against it but lower it instead. Efficiency should also increase in time, not get lower. Unless there is some mechanism involved that leaves previously vaccinated people with waned immune response even more vulnerable that people without any previous immunity.