Is he strong?
He's got radioactive blood.
I assume that "radioactive" in this case means that it is currently producing radiation.
While the spider that bit Peter Parker was certainly radioactive, did it make Peter's blood radioactive? And is it still radioactive years after the spider bite?
I'm looking for an answer that addresses the main comics universe (Earth-616) and/or the 1967 television show. Other universes are welcome as supplementary material.