OK let your mind boggle. Mine's fine. Some guys stand 10,000 or 18,500 feet away (depending on whether taken from text or video) from a nuke explosion then drive off. How much ionizing radiation were they exposed to? Probably very little. I'm not sure. Over the years in their job.. who knows. From my understanding, it's the fallout and contaminated food that is dangerous. As to vaccinations, I think it's an apt analogy. You get 1 jab and never get an illness. It must have been the jab, right?