Transplant drug turns traitor to tackle viruses


IT’S the biological equivalent of a turncoat. A drug used to stop immune cells from gobbling up transplanted organs and bone marrow has been caught boosting the immune response to a virus in mice and monkeys. It might now be used to enhance vaccines against cancer and other diseases. Transplant recipients take rapamycin because it blocks the production of a range of different immune cells. But when Rafi Ahmed and colleagues at Emory University School of Medicine in Atlanta, Georgia, gave the drug to mice infected with a virus,
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