At high doses the effects can be certain and acute. At low doses, the main concern is a probabilistic increase in cancer risk, with statistical uncertainties when doses are close to natural background. Radiation protection bodies adopt precautionary approaches, but this does not mean that every minimal exposure produces observable harm. Dose and context are essential.
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76.
Is low-level radiation always harmful?
Not in a deterministic way; the risk is probabilistic and dose-dependent.
