Still, reports on population exposure are as much guesswork as science.

WSJ: In Japan, Relief at Radiation's Low Toll

Dr. Yamashita, of Fukushima Medical University, said that, though radiation exposure for the general population has likely been low, evacuations and fear of radiation could lead to problems such as increased consumption of alcohol and stress-related illnesses.

WSJ: In Japan, Relief at Radiation's Low Toll

Is there ample evidence that a percentage of the population can suffer extremely serious health issues from gluten exposure?

FORBES: Does Gluten Deserve to be on the Public Health Enemies List?

Brenner replied that there are several studies of the exposure following Fukushima that show the local population received low doses that amount to less risk, for the individual, than other hazards common in life.

FORBES: How To Quell Radiation Fears? 'Test Everybody'

His congressional district is part of the Milwaukee media market, giving him broad exposure to much of the state's population.

WSJ: Ryan Provides Wisconsin Lift but No Guarantee