Drawing on his love of fly-fishing, he developed a balloon catheter that removes blood clots from patients’ limbs in a minimally invasive way. It has saved millions of lives.

The term, long considered a slur for those with intellectual disabilities, is seeing a resurgence on social media and across the political right.

Dozens of doctors and therapists said chatbots had led their patients to psychosis, isolation and unhealthy habits.

The National Institutes of Health failed to protect brain scans that an international group of fringe researchers used to argue for the intellectual superiority of white people.

Dr. Kirk Milhoan, a pediatric cardiologist who leads the Advisory Committee on Immunization Practices, said a person’s right to refuse a vaccine outweighed concerns about illness or death from infectious diseases.

A crackdown on problems with fairness and safety is achieving results, including a big drop in the number of sick patients being passed over for transplants.

At two congressional hearings, lawmakers slammed executives of major companies, saying they were failing to rein in the cost of medical care for consumers.

A planned U.S.-funded study of a hepatitis B vaccine drew widespread condemnation from researchers. Now the host country says it cannot proceed.

The prohibition halts support for projects both inside and outside the N.I.H. President Biden had restored funding after an earlier ban by President Trump during his first term.

Narcissism has become a catchall label for a range of frustrating behaviors. Here are some misconceptions about what it means.