Explosions carry radioactive radionuclide far away. Throughout Japan, places of intense radioactivity are discovered, the so called "hotspots". The following reports show how problematic the situation really is, a report by Al Jazzera and a private measurment near Koriyama, 60km away from Fukushima. (Allowed yearly dose in Japan 20mSv/h)
More signs of radiation sickness and symptomes in young children:
Nov. 7 — “A survey shows that some children in Fukushima Prefecture have smaller average weight gains this year compared to the year before. A pediatrician says the results indicate the negative effects of the nuclear plant accident in March,” reports NHK.
“Doctor Shintaro Kikuchi tracked the weights of 245 children aged from 4 to 6 in 2 kindergartens in Koriyama City, Fukushima Prefecture. The results show an average weight increase of 0.81 kilograms over the past year through June. The increase for children in the same age group the previous year was 3.1 kilograms.”