“…1484 of the Euratom Biology Division contradictory (Cosgrove et al, 1964;Dacquisto and Benson, 1962;Doull et al, 1963;Holleroft et al, 1957;Maisin, 1968;Maisin et al, 1970Maisin et al, , 1971Maisin and Lambiet-Collier, 1968;Maisin et al, 1977a;Mewissen and Brucer, 1957;Nelson et al, 1963Nelson et al, , 1967Nelson et al, , 1971Upton et al, 1959;Wand and Hasegawa, 1968), and it is uncertain whether the late damage in the animals protected against the acute effects is repaired as efficiently as it is in nonprotected animals which received a lower dose corresponding to a same survival rate. In order to obtain more information on these questions -repair with respect to late effects and the effects of radioproteetors on this repair -normal and protected mice were irradiated at regular intervals until death.…”