On a recent Friday morning, Daniel, a lawyer in his early 40s, was in a…

The family of Brendan Costello gathered in the hospital half-light. He had overcome so much…

Struggling to contain a raging measles epidemic in West Texas, public health officials increasingly worry…

Johns Hopkins University, one of the country’s leading centers of scientific research, said on Thursday…

Dr. Sheldon Greenfield, whose pioneering research found that older patients with breast and pancreatic cancer…

In a hearing on Friday, senators pressed Dr. Mehmet Oz, the TV celebrity nominated to…