No. Caesium 137 is probably the worst offender, but there is not much you can do as an individual other than to stay away from contact with it. Also, this is n

No. Caesium 137 is probably the worst offender, but there is not much you can do as an individual other than to stay away from contact with it. Also, this is not about lethal doses. There is typically very small area in immediate vicinity of the explosion that is directly lethal (like, LD50 lethal). Most of the effect on large area is through increased radiation and through radioactive elements getting concentrated in food chain and in various tissues of your body. You might never know if the radiation from the event was what is killing you but this can be measured statistically to say "over X years there is Y deaths additional to what could be expected that could be attributed to increased radiation".