Radiation
sickness, known as acute radiation sickness (ARS), is a serious illness
that occurs when the entire body (or most of it) receives a high dose
of radiation, usually over a short period of time. Many survivors of
the Hiroshima and Nagasaki atomic bombs in the 1940s and many of the
firefighters who first responded after the Chernobyl Nuclear Power Plant
accident in 1986 became ill with ARS.
People
exposed to radiation will get ARS only if:
- The
radiation dose was high (doses from medical procedures such as chest
X-rays are too low to cause ARS; however, doses from radiation therapy
to treat cancer may be high enough to cause some ARS symptoms),
- The
radiation was penetrating (that is, able to reach internal organs),
- The
person's entire body, or most of it, received the dose, and
- The
radiation was received in a short time, usually within minutes.
The
first symptoms of ARS typically are nausea, vomiting, and diarrhea.
These symptoms will start within minutes to days after the exposure,
will last for minutes up to several days, and may come and go. Then
the person usually looks and feels healthy for a short time, after
which he or she will become sick again with loss of appetite, fatigue,
fever, nausea, vomiting, diarrhea, and possibly even seizures and coma.
This seriously ill stage may last from a few hours up to several months.
People
with ARS typically also have some skin damage. This damage can start
to show within a few hours after exposure and can include swelling,
itching, and redness of the skin (like a bad sunburn). There also can
be hair loss. As with the other symptoms, the skin may heal for a short
time, followed by the return of swelling, itching, and redness days
or weeks later. Complete healing of the skin may take from several
weeks up to a few years depending on the radiation dose the person's
skin received.
The
chance of survival for people with ARS decreases with increasing radiation
dose. Most people who do not recover from ARS will die within several
months of exposure. The cause of death in most cases is the destruction
of the person's bone marrow, which results in infections and internal
bleeding. For the survivors, the recovery process may last from several
weeks up to 2 years.
If
a radiation emergency occurs that exposes people to high doses of radiation
in a short period of time, they should immediately seek medical care
from their doctor or local hospital.
For
more information about radiation and emergency response, see the Centers
for Disease Control and Prevention's website at http://www.bt.cdc.gov or
contact the following organizations:
The
Centers for Disease Control and Prevention (CDC) protects people's
health and safety by preventing and controlling diseases and injuries;
enhances health decisions by providing credible information on critical
health issues; and promotes healthy living through strong partnerships
with local, national, and international organizations.
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