«Given the projected very
low frequency, 3.2 per 10,000, of radiation - associated thyroid cancer among young people, it is unlikely that any excess would be
detectable by the usual epidemiologic approaches,» says Roy Shore, head of research
at the Radiation Effects Research Foundation in Hiroshima, and a co-author of the WHO report.
For instance, astronomers believe that gravitational waves also exist
at much
lower frequencies than what is
detectable by the LIGO and Virgo instruments, but in order to sense these waves, the length of the interferometer arms will need to be much, much longer.