New findings may solve a longstanding mystery about the immune system: How does it know what's going on in the brain? From a distance, researchers say.

You need a new shot every year because current flu vaccines provide limited and temporary protection. But researchers' new strategy could mean a one-and-done influenza vaccine is on the way.

Researchers have a new theory about the cause of and rise in food allergies. They say it involves the body's natural food quality control system.

Replication of a hyperimmune response in nonhuman primates could one day lead to treatments for people with severe cases of COVID-19.

Researchers have pinpointed a key factor in brain aging and cognitive decline. They say it could be possible to reverse it, too.

Replication of a hyperimmune response in nonhuman primates could one day lead to treatments for people with severe cases of COVID-19.

Foods like nuts, avocados, and olive oil are rich in a fatty acid called oleic acid. New research suggests it could help some multiple sclerosis patients.

New research in mice may clarify why premature infants who survive necrotizing enterocolitis also develop a severe brain injury.

Cells that researchers don't usually think of as having to do with the immune system may actually play a key early role in alerting the body to infection.