A seventh patient has died due to infection with an antibiotic-resistant strain of Klebsiella pneumoniae at the US National Institutes of Health's Clinical Center, reports the Washington Post. NIH researchers recently outlined in Science Translational Medicine their use of whole-genome sequencing to track the outbreak that began there in June of last year. The outbreak seemingly ended in January until this patient, a boy suffering from complications due to a bone marrow transplant, became ill in July. The Post says that the strain infecting the boy genetically matches the one circulating last year, despite the hospital's efforts to isolate and prevent the spread of the bacteria. "This kid probably got this infection because a patient who was a carrier [of the superbug] was on the same unit," says John Gallin, the director of the NIH hospital, to the Post. "There was undoubtedly some intrahospital transmission despite our best efforts."