" Tests showed there was no enrichment. “They’re just slinging purified uranium at us, straight from the mines,” Bob said. But the next week Bob fell ill. A red rash spread from his face all over his body. The bumps were as big as marbles and itched “like the bejesus,” he said in a feverish daze. He died two days later of smallpox. • "

― Gregory Benford , The Berlin Project