REPAIR ASSOCIATED WITH THE EROSIVE EFFECTS OF
FALLOUT DAMAGEIN INDIVIDUALS AND POPULATION
GROUPS
By Paci 8. Hansaaw
7. §. Atomic Energy Commission, Washington, D.C.
This symposiumis devoted to damage caused
in living systems by radiation from fallout.
Yesterday, attention was given to the physical
fitness in population groups. The comments I
shall make will be more in terms of interpreta-
This action is clarified, however, by considering
have been used frequently during the past
certain features of both acute and protracted
irradiation exposures.
The ideas I have to present deal with the
problems of recovery associated with three
——
ness; (2) those connected in a way with life
aspects of problems involved. Today, we are
turning to the biologieal aspects~ particularly
repatr. Because fallout is pervasive and offective through time, its action is more subtle.
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types of erosive effects caused by radiation: (1)
Those that occur following irradiation sick-
shortening; and (3) those involved with reduced
tion than in mathematical treatments such as
several months.
Figure 1 gives orientation with respect to
phases of the injury response in human beings
following acute irradiation exposure —phases
ay
ACUTE
EXPOSURE
BLOOD AND
GENERATIVE
TISSYE CHANGES
wy
R
é&
ween
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ic’2
%,
OEATH
DEATH
I
Hq
ACUTE PHASE
6 TO 12 WEEKS
INTERMEDIATE PHASE
MONTHS OR YEARS
int
TERMINAL PHASE
nner DAYS OR WEEKS
Fiauns 1.—- Pattern of trradiation injury.
8T