Without the postpartum and early childcare of those countries.

Denmark doesn't do mandatory vaccines to the same degree as they catch early development of disease and treat it when it appears, consistently across the whole population.

The US has a case for mandatory multi childhood vacination as the data shows otherwise preventable childhood diseases will spread untreated and unchecked.

If you like Japan and Denmark and want the same - get onto improving the US health system for everybody regardless of employment status.

Really? This seems much stricter than you seem to be suggesting...

https://www.jpeds.or.jp/uploads/files/20240220_Immunization_...

Japanese tend to be irrationally anti-vaccine