covid vax was mnra vaccine. what you got during childhood was traditional vaccine.  strictly speaking mnra isn't vaccine but gene therapy. they just changed definition when people pointed this out.  traditional vaccines have tradeoff. to make them shelf stabel they have to add lot of stuff in them. they are just dead virus or parts of virus. that makes your immune system to react. but how long dose deaf virus lasts? that's when things get iffy. they aren't perfect. neither is getting every childhood diseases out there.  i think they are going too far with those vax too. they are starting to vax nothing burger stuff too.
Finland