US
Readings show levels in three Japanese cities are almost the same as in major cities outside of Japan, including Seoul
A study published in the New Zealand Medical Journal notes
Far-UVC light is not a human health hazard and can kill viruses and bacteria
The pollution would not be sufficient to cause an impact on human health or the environment in Europe
Radiation was detected in nasal cavities of the worker on Friday
Some 74,000 people died in the explosion, while thousands perished months or years later from radiation sickness