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U.S. health officials on Friday lifted a recommended hiatus for the use of Johnson & Johnson's Covid-19 vaccine and provided assistance to state and local authorities in distributing the doses that are considered critical to delivering…

"There is evidence that a fairly simple, five-minute, low-dose, low-radiation scan can really save many lives," said Dr. Bernard J. Park, pulmonary surgeon and clinical director of the lungs. Screening service at the Memorial Sloan…