See for example, this research from the University of Iowa showing that “cumulative radon exposure is a significant risk factor for lung cancer in women”.
And see these studies on the health effects cumulative doses of radioactive cesium. (As noted on March 29th, the radioactive cesium fallout from Japan already rivals Chernobyl. And the amount of radioactive fuel at Fukushima dwarfs Chernobyl).
Admittedly, the damage from huge single doses may be greater than the same cumulative dose from many small exposures. But the smaller doses can still add up.
Remember, the radiation from CT scans and x-rays are external emitters – the radiation emanates from outside the body. In contract, internal emitters keep emitting their radiationinside the body. Therefore, the cumulative effect of multiple small doses of radiation frominternal emitters could be even more dramatic, depending on the half life, metabolic pathways and other properties of the particular radioactive particle.
As the European Committee on Radiation Risk notes:
Cumulative impacts of chronic irradiation in low doses are … important for the comprehension, assessment and prognosis of the late effects of irradiation on human beings …
And see this.
Fukushima reactor No. 4 vulnerable to catastrophic collapse; could unleash 85 times Cesium-137 radiation of Chernobyl; human civilization on the brink
(NaturalNews) The news you are about to read puts everything else in the category of “insignificant” by comparison. Concerned about the 2012 U.S. presidential election? Worried about GMOs? Fluoride? Vaccines? Secret prisons? None of that even matters if we don’t solve the problem of Fukushima reactor No. 4, which is on the verge of a catastrophic failure that could unleash enough radiation to end human civilization on our planet. (See the numbers below.)
The resulting releasing of radiation would turn North America into a “dead zone” for humans… mutated (and failed) crops, radioactive groundwater, skyrocketing infant mortality, an explosion in cancer and infertility… this is what could be unleashed at any moment from an earthquake in Japan. Such an event could result in the release of 85 times the Cesium-137 released by the Chernobyl catastrophe, say experts (see below). And the Chernobyl catastrophe made its surrounding regions uninhabitable by humans for centuries.
Yet, astonishingly, the usual suspects of deception are saying absolutely nothing about this problem. The mainstream media (the dying dinosaur media, actually) pretends there’s no problem with Fukushima. President Obama says nothing about it. Federal regulators, including the NRC, are all but silent. It’s as if they think their silence on the issue somehow makes it go away.
Perhaps these professional liars in the media and government have become so used to idea that they can simply spin their own reality (and get the public suckers to believe almost anything) that they now believe they can ignore the laws of physics. That’s why they have refused to cover the low-level radiation plume that continues to be emitted from Fukushima.
The fate of the world now rests on reactor No. 4
“It is no exaggeration to say that the fate of Japan and the whole world depends on No.4 reactor.” – Mitsuhei Murata, Former Japanese Ambassador to Switzerland and Senegal, Executive Director, the Japan Society for Global System and Ethics
Mr. Murata’s stunning statement should be front-page news everywhere around the world. Why? Because he’s right. If reactor No. 4 suffers even a minor earthquake, it could set off a chain reaction of events that quickly lead to North America becoming uninhabitable by humans for centuries to come. Imagine California, Oregon and Washington states being inundated with radiation — up to 85 times the radiation release from Chernobyl. We’re talking about the end of human life on the scale of continents.
Arnie Gunderson – one of the most important scientific voices of truth and reason on this issue