I think the concern getting more attention is what long-term exposure risk is there to actual changes in your DNA structure. I am not a scientist, but have read that studies on rats, under the test conditions, did show all kinds of changes to dna as well as behavorial changes. How the test conditions relate to the level of exposure in this machines, especially for frequent flyers, I have no idea, and certainly don’t trust the govt or the manufacturer to provide compelling test data.
Big Brother has a long history of nefarious things they’ve done to We The People without their knowledge.