Rapamycin, a drug given to transplant recipients to suppress their immune systems, has a paradoxical effect on cells responsible for immune memory, scientists at the Emory Vaccine Center have discovered.

Scientists in the Greene Infectious Disease Laboratory of the Columbia University Mailman School of Public Health and colleagues in the Victorian Infectious Diseases Reference Laboratory in Melbourne, Australia and 454 Life Sciences have discovered a new virus that was responsible for the deaths of three transplant recipients who received organs from a single donor in Victoria, Australia.