ode Comparative studies of growth and development in. irradiated and unirradiated children revealed a suggestive trend of slight lag in growth of the children who were irradiated at ages beteeen one and six ot seven years. Eowever, the mmbers of children involved are toe small to sake satisfactory statistical analysis. Tre mest recent deta have not been analyzed yet, Hesatelesicnl studies shored that the celluler levels of the bleed have returned to the ievels ef unirradiated populations with the passible exceptions of the ivaphecytes and platelets which aypear to be stili very Sidghtay below the unirradiated ieveia. This slight lag in cempiete re- covery appeare to be mainiy af academic interest since there has been co indication of any i11 effect assoclated with this finding. Lack of vital stetistics on the Marshallese people wake‘ it difficult to evaluate some findings satisfactorily. ftHovever, fertility dees not aprear te have deen eifected aince avout the same number of children heave been born of irradiated as of unirradiated parents. Pregoancies have been normal with about the sane mumver of aiscarriages or stilibirtha occurring in both greups. Infants torn following in utero irradiation er born of Irradiated pare te anpeared normal. No lonyeterm effects of irradiation have been seen. So malig- nancies or leukemia have been seen; no increase in degenerative diseascs} HO premature aging or sherteniag of Lite span; ne radiation induced Cateracts of the cyes; and no genetic effecrs have buen noted. The becy. burden of radivisctopes has dwindled rapidly, aud ag of March, 1957 consisted zainly of cg? ceh4 - prit4 asd gr? in amounts far below the accepted tolerance levels. The present body burdea appears to be @lishtly increased above last year due to sli.ht environmental cone