The Hansons learned in May at an oncology checkup that leukemia — which Lincoln beat as a toddler — had returned. But it was worse this time.

A Health Affairs study from the University of Pennsylvania found that lump sum annual payments to hospitals resulted in mixed financial results.

The macro environment of American vaccine policy is being radically reshaped by Robert F. Kennedy Jr. — an abrupt shift that is casting a pall on the business of developing vaccines.

Northern snakeheads are native to China, Russia, and Korea and made their first local appearance in Pennsylvania in 2004 at Meadow Lake in Philadelphia’s FDR Park.

Exposure to air pollution was associated with worse cases of Alzheimer's disease in a study that analyzed autopsied brain tissue from several hundred patients.