A single particle ? Not much, it might impact the DNA of a few cells but your body will deal with it, like it does for any kind of DNA damage like sun radiation

A single particle ? Not much, it might impact the DNA of a few cells but your body will deal with it, like it does for any kind of DNA damage like sun radiation A beam of it ? You'll definitely notice: https://en.wikipedia.org/wiki/Anatoli_Bugorski https://en.wikipedia.org/wiki/Anatoli_Bugorski