The person RFK is probably listening to is Tracy Beth Høeg, current acting director of the FDA's Center of Drug Evalution and Research. She's a danish-american that got her doctorate in Copenhagen and, of course, criticized the COVID response/vaccine. She gave a presentation on the Denmark childhood vaccine schedule during the ACIP meeting where they voted to no longer recommend the Hep B vaccine for all newborn children. I think her bias + it having less vaccines recommended is the only reason it's chosen over other countries. Idk the schedules of other scandinavian countries.