Symptoms of acute radiation sickness (hematopoietic form)

time after exposure supralethal dose range

(6–10 Gy) midlethal dose range

(2.5–5 Gy) sublethal dose range

(1–2 Gy)

several hours no definite symptoms nausea and vomiting

first week diarrhea, vomiting, inflammation of throat no definite symptoms

second week fever, rapid emaciation leading to death for 100 percent of the population

third week loss of hair begins

loss of appetite

general malaise

fever, hemorrhages, pallor leading to rapid emaciation and death for 50 percent of the population

loss of appetite

sore throat

pallor and diarrhea

recovery begins (no deaths in absence of complications)