Medicine: Return of the Philly Killer

Legionnaires' disease strikes in a Vermont hospital

At first the patients seemed to be suffering from simple pneumonia. But when doctors at the Medical Center Hospital of Vermont in Burlington investigated further last August, they realized that they were probably dealing with something more puzzling and dangerous. As Dr. Harry Beaty, the hospital's chief of medicine, recalls, the symptoms—dry cough, abdominal pain, general malaise —"were defying all our usual concepts of pneumonia." So he promptly sent off blood samples to Atlanta's Center for Disease Control (CDC). A few weeks later the center's sleuths...

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