With the terrible earthquake and resulting tsunami that have devastated Japan, the only good news is that anyone exposed to excess radiation from the nuclear power plants is now probably much less likely to get cancer.
This only seems counterintuitive because of media hysteria for the past 20 years trying to convince Americans that radiation at any dose is bad. There is, however, burgeoning evidence that excess radiation operates as a sort of cancer vaccine.
As The New York Times science section reported in 2001, an increasing number of scientists believe that at some level -- much higher than the minimums set by the U.S. government -- radiation is good for you. "They theorize," the Times said, that "these doses protect against cancer by activating cells' natural defense mechanisms."
Among the studies mentioned by the Times was one in Canada finding that tuberculosis patients subjected to multiple chest X-rays had much lower rates of breast cancer than the general population.
And there are lots more!
A $10 million Department of Energy study from 1991 examined 10 years of epidemiological research by the Johns Hopkins School of Public Health on 700,000 shipyard workers, some of whom had been exposed to 10 times more radiation than the others from their work on the ships' nuclear reactors. The workers exposed to excess radiation had a 24 percent lower death rate and a 25 percent lower cancer mortality than the non-irradiated workers.
Isn't that just incredible? I mean, that the Department of Energy spent $10 million doing something useful? Amazing, right?
In 1983, a series of apartment buildings in Taiwan were accidentally constructed with massive amounts of cobalt 60, a radioactive substance. After 16 years, the buildings' 10,000 occupants developed only five cases of cancer. The cancer rate for the same age group in the general Taiwanese population over that time period predicted 170 cancers.
The people in those buildings had been exposed to radiation nearly five times the maximum "safe" level according to the U.S. government. But they ended up with a cancer rate 96 percent lower than the general population.
Bernard L. Cohen, a physics professor at the University of Pittsburgh, compared radon exposure and lung cancer rates in 1,729 counties covering 90 percent of the U.S. population. His study in the 1990s found far fewer cases of lung cancer in those counties with the highest amounts of radon -- a correlation that could not be explained by smoking rates.
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