Safe level of radiation (or lack of thereof) is a subject of discussion, see "Linear No-Threshold": https://en.wikipedia.org/wiki/Linear_no-threshold_model http

Safe level of radiation (or lack of thereof) is a subject of discussion, see "Linear No-Threshold": https://en.wikipedia.org/wiki/Linear_no-threshold_model https://en.wikipedia.org/wiki/Linear_no-threshold_model But even if the relation is linear, for some doses the effect in negligible, comparing to other diseases/accidents/...