seses to the inf@ar tnyr.-c .ron 1 1s are large duses -f 3 me, - utes paige lee .-f:yS @iruntay ©... On the othér hand. if an 220 cf C.i is closer > the truth, then it will be diflicwlc te separate tre radaatiin- induced cancers frem the “spontaneous". Ome sannct nein but wonder what rraction cf the sc-called “spon- taneous” <ancers are in fact cue to medical x-rays given before or after birth. If a sufficientiy high threshceld exists for the induction of thyroid cancer by irradiation, cnen there nay be no cases caused by fallout. The fact that many children were born when there was no testing with- which the noraal in 2 years of birth provides an internal control by & incidence of thyroid cancer in Utah can be established. . Also, the distribution of fallout suggests that slightly contaminated areas “Gould serve aS controls for those heavily contaminated. Finally, the fact that with other factors being equal, ysl dose is proportional to milk consumption Suggests that in theory the low milk drinkers could serve as controls Sor the high milk drinkers. However, from the practicel standpoint, the work and uncertainty in estimating individual milk consumptions in retrospect doesnetieus x gising except for limited areas such as St. George tion is the prediction that the mmber of cases jared to that for the state as a whole. Ie is indeed fortunate that ‘only a few hundred children received high exposures. Crude as these dose estimates are, they indicate the advisability of studies for possible delayed radiation effects in Utah. To be fruitful such studies should have long-term support and look for other effects in addition to thyroid cancer.