Medicine

Antibodies to a portion of the influenza virus that varies relatively little from strain to strain may provide flu protection in humans

The data are spotty, but there’s still a reasonable case to be made

A controversial theory holds that one immunization, given properly, can protect against many diseases besides its target

Agency officials press sometimes confused stakeholders for more data. Is it possible to define a “more effective CBD cosmetic?”

A novel mechanism has been discovered in the bucktoothed rodents’ ability to withstand hurt

The health promises of boosting an important metabolic molecule may be clouded by its possible role in promoting cancer-cell growth

The FDA is stepping up its oversight of the $50 billion nutritional supplement industry

Cannabidiol reduces levels of stress hormone and blunts urge to use opioids

A cutting-edge therapy currently used for blood cancers is now being adapted to fight solid tumors

Clinical-trial participants and their carers are gaining influence over how experiments are run. As they take to social media, that could make things messy for the science

In the past, measles outbreaks have been brought under control with vaccines, but the dynamic may be shifting

In his memoirs, the womanizing writer Giacomo Casanova described suffering several bouts of gonorrhea—but researchers found no trace of the microbe on his handwritten journals. Karen Hopkin reports.