(4) Cenplhete posevesy to noses Was Shove bean levels for platelots, pranuleoytou ond Iyuohocybe: weed below the control levels ue renoined slishtly, but consistently, during the follevup surveys until the llth yeer (1965). These “differences were statistically significant at varicus exandnations. In 1965, the neen counts for all blood elements renched control velucs. Ins pection of the moan values calculated for children ased 15 years or younzer at the tine of each exanination showed essentially the sexe> pattern of variation frou the control velucs, reaching contrel values in 19657, Late Effects The significant late effects of the fallout radiation have been the retardation of growth and the development of thyroid abnormalitics awrong the wo o Ronselap children exposed at young ages oO . Toreitudinel anthropometric deta, including skeletal ace assessments, Analyses of these mersurenéents showed, in the exposed boys enly, a slight bu cr . have been accumulated on these childrcn. consistent retearcation in body size (expressed as stature) during growth from the 4th through the 16th year as compered to the statural growth curve of the unexposed boys. differ.ace, however, was not statisticelly significant. ‘This No difference in , the growth curves was noted among gi rist? . : Further examination of the data y sugsested that the retardation noted in the boys was most marked arong those who were 5 years of asa or youncer at the time of tha falllout?>, (Foe growth and development ctusiies, bacauce of the relatively small numbers of chilere jn the various aco groups, the Atlincncs and Rongelap populations have boon conbined.) 5001333