19. Exhibition Severity Symptoms Some millisieverts only possible long-term Several hundred millisieverts No immediate effect Possible temporary nausea and slight fever Between 1 000 and 2 000 millisieverts remarkable medical Effect vomiting, fatigue, fever, risk of infection, cancer Between 2 000 and 4 000 millisieverts serious medical Effect vomiting, fever, digestive disorders, bleeding, hair loss, leukemia, other cancers Between 4 000 and 10 000 millisievertsand probability greater than 50% death, property damage neurological (dizziness, disorientation) and cancers of many types Excess of 10 000 mSv safe Death