CAR-T cell therapy is already a potent treatment for certain cancers. Now, a small study is showing early promise for managing HIV.

The work of Peter Aaby and Christine Stabell Benn has long been controversial. Until Robert F. Kennedy Jr. became US health policy chief, most vaccine scientists tended to ignore it. Now they can’t.

Scientists have quantified what draws mosquitoes to people—which could help make better, life-saving bug traps.