Gunderson: Children are 10 to 100 Times More Susceptible to Biological Damage From Radiation

...because their cells are dividing.

See Gunderson RT video
http://letsbeco.eu/fukushima-gross-miscarriage-of-radiation-science/

The Japanese and American governments are involved in a massive cover-up of the worst nuclear disaster in human history.

This disaster is worse than Chernobyl, argues Busby and Gunderson.

What does it mean that the Soviets acted more proactively to protect citizens than the supposed democracies of the US and Japan?

I think the implication is clear. Public welfare is not a priority.