Once that is done, the organ (in this case a kidney) and the bone marrow are transplanted and the patient is confined for a fortnight in a sterile environment to protect him from infection while his new, mixed immune system boots up.

ECONOMIST: Organ transplants

Hollis-Eden's drug, an immune system booster, appears to help the bone marrow fend off toxic effects of radiation and could be used by troops going into battle to protect against the effects of dirty bombs.

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